Colors Encyclopedia

Harmony system

Slate Navy Color Harmonies

Slate Navy color harmonies are generated from #30475E with complementary, analogous, triadic, tetradic, split-complementary, and monochromatic relationships. According to Colors Encyclopedia, these harmony groups turn Slate Navy into a practical palette system for UI design, branding, CSS tokens, accessibility checks, and AI-ready color retrieval.

Slate Navy sits in the blue family with cool temperature and balanced tone attributes. The harmony sets below explain which colors create contrast, which stay close to the source hue, and which work best for interface tokens or palette roles.

JSON data ComplementaryAnalogousTriadicTetradicSplit ComplementaryMonochromatic
SourceSlate Navy · #30475E
Groups6
Palette colors6
FamilyBlue

How the harmony works

Slate Navy Harmony Guide

Slate Navy harmonies are computed from hue relationships rather than subjective palette names. Complementary colors create direct contrast, analogous colors stay close to the source hue, triadic and tetradic groups add broader palette range, split-complementary colors soften contrast, and monochromatic variants keep the same hue for UI surfaces and states.

Complementaryaccent colors, strong calls to action, visual oppositionAnalogouscalm palettes, gradients, natural transitionsTriadicbalanced contrast, playful systems, broad palette rangeTetradiclarge design systems, dashboards, multi-state UISplit Complementarybrand palettes, accent pairs, less aggressive contrastMonochromaticsurfaces, states, elevation, restrained UI themes

Machine-readable data

Machine-Readable Slate Navy Harmony Data (JSON)

Structured harmony groups, source color metadata, CSS tokens, accessibility notes, and related API endpoints for Slate Navy.

AI-Ready Dataset v1.0.0
Luminance0.0594
Black text2.19:1AA Fail
White text9.6:1AA Pass
sourceColorCanonical source color
harmonyGroupsComplementary, analogous, triadic, tetradic, split-complementary, and monochromatic sets
signaturePaletteCompact harmony preview palette
semanticGroupsAI-ready harmony labels
useCasesDesign and retrieval contexts
accessibilityNotesContrast guidance for the source color
Download JSON Open API
Structured sections
Source color
{
  "slug": "slate-navy",
  "name": "Slate Navy",
  "hex": "#30475E",
  "url": "https://www.colorsencyclopedia.com/colors/slate-navy/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-navy.json"
}
Harmony groups
[
  {
    "key": "complementary",
    "label": "Complementary",
    "behavior": "maximum hue contrast",
    "bestUse": "accent colors, strong calls to action, visual opposition",
    "description": "Complementary harmony uses the color opposite the source hue. It creates the strongest direct relationship in the wheel, so it is best for accents, contrast anchors, and palettes that need immediate separation.",
    "colors": [
      {
        "hex": "#5E4731",
        "name": "#5E4731",
        "slug": null,
        "rgb": [
          94,
          71,
          49
        ],
        "hsl": [
          29,
          31,
          28
        ],
        "cmyk": [
          0,
          24,
          48,
          63
        ],
        "luminance": 0.0711,
        "contrast": {
          "black": 2.42,
          "white": 8.67
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/5e4731/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e4731.json"
      }
    ],
    "anchor": "slate-navy-harmony-complementary"
  },
  {
    "key": "analogous",
    "label": "Analogous",
    "behavior": "neighboring hue movement",
    "bestUse": "calm palettes, gradients, natural transitions",
    "description": "Analogous harmony uses hues close to the source color. It keeps the palette visually connected and is useful for quiet interfaces, editorial color systems, and smooth background or gradient work.",
    "colors": [
      {
        "hex": "#315E5E",
        "name": "#315E5E",
        "slug": null,
        "rgb": [
          49,
          94,
          94
        ],
        "hsl": [
          180,
          31,
          28
        ],
        "cmyk": [
          48,
          0,
          0,
          63
        ],
        "luminance": 0.0947,
        "contrast": {
          "black": 2.89,
          "white": 7.26
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/315e5e/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/315e5e.json"
      },
      {
        "hex": "#31315E",
        "name": "#31315E",
        "slug": null,
        "rgb": [
          49,
          49,
          94
        ],
        "hsl": [
          240,
          31,
          28
        ],
        "cmyk": [
          48,
          48,
          0,
          63
        ],
        "luminance": 0.0366,
        "contrast": {
          "black": 1.73,
          "white": 12.12
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/31315e/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/31315e.json"
      }
    ],
    "anchor": "slate-navy-harmony-analogous"
  },
  {
    "key": "triadic",
    "label": "Triadic",
    "behavior": "three evenly spaced hues",
    "bestUse": "balanced contrast, playful systems, broad palette range",
    "description": "Triadic harmony places colors around the wheel at equal intervals. It gives more range than analogous harmony while keeping a stable mathematical relationship between the selected hues.",
    "colors": [
      {
        "hex": "#5E3147",
        "name": "#5E3147",
        "slug": null,
        "rgb": [
          94,
          49,
          71
        ],
        "hsl": [
          331,
          31,
          28
        ],
        "cmyk": [
          0,
          48,
          24,
          63
        ],
        "luminance": 0.0503,
        "contrast": {
          "black": 2.01,
          "white": 10.47
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/5e3147/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e3147.json"
      },
      {
        "hex": "#475E31",
        "name": "#475E31",
        "slug": null,
        "rgb": [
          71,
          94,
          49
        ],
        "hsl": [
          91,
          31,
          28
        ],
        "cmyk": [
          24,
          0,
          48,
          63
        ],
        "luminance": 0.0957,
        "contrast": {
          "black": 2.91,
          "white": 7.21
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/475e31/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/475e31.json"
      }
    ],
    "anchor": "slate-navy-harmony-triadic"
  },
  {
    "key": "tetradic",
    "label": "Tetradic",
    "behavior": "two complementary pairs",
    "bestUse": "large design systems, dashboards, multi-state UI",
    "description": "Tetradic harmony creates a four-color system from two complementary relationships. It is useful when a palette needs multiple roles, but the colors should be assigned carefully so one hue remains dominant.",
    "colors": [
      {
        "hex": "#5E315E",
        "name": "#5E315E",
        "slug": null,
        "rgb": [
          94,
          49,
          94
        ],
        "hsl": [
          300,
          31,
          28
        ],
        "cmyk": [
          0,
          48,
          0,
          63
        ],
        "luminance": 0.0538,
        "contrast": {
          "black": 2.08,
          "white": 10.12
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/5e315e/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e315e.json"
      },
      {
        "hex": "#5E4731",
        "name": "#5E4731",
        "slug": null,
        "rgb": [
          94,
          71,
          49
        ],
        "hsl": [
          29,
          31,
          28
        ],
        "cmyk": [
          0,
          24,
          48,
          63
        ],
        "luminance": 0.0711,
        "contrast": {
          "black": 2.42,
          "white": 8.67
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/5e4731/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e4731.json"
      },
      {
        "hex": "#315E31",
        "name": "#315E31",
        "slug": null,
        "rgb": [
          49,
          94,
          49
        ],
        "hsl": [
          120,
          31,
          28
        ],
        "cmyk": [
          48,
          0,
          48,
          63
        ],
        "luminance": 0.0888,
        "contrast": {
          "black": 2.78,
          "white": 7.56
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/315e31/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/315e31.json"
      }
    ],
    "anchor": "slate-navy-harmony-tetradic"
  },
  {
    "key": "splitComplementary",
    "label": "Split Complementary",
    "behavior": "softened complementary contrast",
    "bestUse": "brand palettes, accent pairs, less aggressive contrast",
    "description": "Split-complementary harmony replaces the direct opposite with the two hues beside it. This keeps useful contrast while reducing the visual tension of a pure complementary pair.",
    "colors": [
      {
        "hex": "#5E3131",
        "name": "#5E3131",
        "slug": null,
        "rgb": [
          94,
          49,
          49
        ],
        "hsl": [
          0,
          31,
          28
        ],
        "cmyk": [
          0,
          48,
          48,
          63
        ],
        "luminance": 0.048,
        "contrast": {
          "black": 1.96,
          "white": 10.71
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/5e3131/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e3131.json"
      },
      {
        "hex": "#5E5E31",
        "name": "#5E5E31",
        "slug": null,
        "rgb": [
          94,
          94,
          49
        ],
        "hsl": [
          60,
          31,
          28
        ],
        "cmyk": [
          0,
          0,
          48,
          63
        ],
        "luminance": 0.1061,
        "contrast": {
          "black": 3.12,
          "white": 6.73
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/hex/5e5e31/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e5e31.json"
      }
    ],
    "anchor": "slate-navy-harmony-split-complementary"
  },
  {
    "key": "monochromatic",
    "label": "Monochromatic",
    "behavior": "same hue, different values",
    "bestUse": "surfaces, states, elevation, restrained UI themes",
    "description": "Monochromatic harmony keeps the source hue and changes lightness. It is the safest system for tonal UI, cards, hover states, shadows, backgrounds, and subtle visual hierarchy.",
    "colors": [
      {
        "hex": "#50759B",
        "name": "#50759B",
        "slug": null,
        "rgb": [
          80,
          117,
          155
        ],
        "hsl": [
          210,
          32,
          46
        ],
        "cmyk": [
          48,
          25,
          0,
          39
        ],
        "luminance": 0.1679,
        "contrast": {
          "black": 4.36,
          "white": 4.82
        },
        "wcag": {
          "AA": [
            "#FFFFFF"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/hex/50759b/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/50759b.json"
      },
      {
        "hex": "#30475E",
        "name": "Slate Navy",
        "slug": "slate-navy",
        "rgb": [
          48,
          71,
          94
        ],
        "hsl": [
          210,
          32,
          28
        ],
        "cmyk": [
          49,
          24,
          0,
          63
        ],
        "luminance": 0.0594,
        "contrast": {
          "black": 2.19,
          "white": 9.6
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/colors/slate-navy/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-navy.json"
      },
      {
        "hex": "#111922",
        "name": "#111922",
        "slug": null,
        "rgb": [
          17,
          25,
          34
        ],
        "hsl": [
          212,
          33,
          10
        ],
        "cmyk": [
          50,
          26,
          0,
          87
        ],
        "luminance": 0.0093,
        "contrast": {
          "black": 1.19,
          "white": 17.71
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/111922/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/111922.json"
      }
    ],
    "anchor": "slate-navy-harmony-monochromatic"
  }
]
Signature palette
[
  "#30475E",
  "#5E4731",
  "#315E5E",
  "#31315E",
  "#50759B",
  "#111922"
]
Accessibility notes
[
  "Black contrast on Slate Navy: 2.19:1",
  "White contrast on Slate Navy: 9.6:1",
  "AA text options: #FFFFFF, #F5F5F5"
]
CSS tokens
":root {\n  --color-slate-navy: #30475E;\n  --slate-navy-complementary-1: #5E4731;\n  --slate-navy-analogous-1: #315E5E;\n  --slate-navy-analogous-2: #31315E;\n  --slate-navy-triadic-1: #5E3147;\n  --slate-navy-triadic-2: #475E31;\n  --slate-navy-tetradic-1: #5E315E;\n  --slate-navy-tetradic-2: #5E4731;\n  --slate-navy-tetradic-3: #315E31;\n  --slate-navy-split-complementary-1: #5E3131;\n  --slate-navy-split-complementary-2: #5E5E31;\n  --slate-navy-monochromatic-1: #50759B;\n  --slate-navy-monochromatic-2: #30475E;\n  --slate-navy-monochromatic-3: #111922;\n}\n\n.palette-slate-navy-harmony {\n  color: #FFFFFF;\n  background: linear-gradient(135deg, #30475E, #5E4731, #315E5E, #31315E, #50759B, #111922);\n}"
Full JSON dataset 
{
  "datasetVersion": "1.0.0",
  "slug": "slate-navy",
  "name": "Slate Navy",
  "hex": "#30475E",
  "rgb": [
    48,
    71,
    94
  ],
  "hsl": [
    210,
    32,
    28
  ],
  "cmyk": [
    49,
    24,
    0,
    63
  ],
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "balanced"
  ],
  "luminance": 0.0594,
  "contrast": {
    "black": 2.19,
    "white": 9.6
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "sourceColor": {
    "slug": "slate-navy",
    "name": "Slate Navy",
    "hex": "#30475E",
    "url": "https://www.colorsencyclopedia.com/colors/slate-navy/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-navy.json"
  },
  "harmonyGroups": [
    {
      "key": "complementary",
      "label": "Complementary",
      "behavior": "maximum hue contrast",
      "bestUse": "accent colors, strong calls to action, visual opposition",
      "description": "Complementary harmony uses the color opposite the source hue. It creates the strongest direct relationship in the wheel, so it is best for accents, contrast anchors, and palettes that need immediate separation.",
      "colors": [
        {
          "hex": "#5E4731",
          "name": "#5E4731",
          "slug": null,
          "rgb": [
            94,
            71,
            49
          ],
          "hsl": [
            29,
            31,
            28
          ],
          "cmyk": [
            0,
            24,
            48,
            63
          ],
          "luminance": 0.0711,
          "contrast": {
            "black": 2.42,
            "white": 8.67
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/5e4731/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e4731.json"
        }
      ],
      "anchor": "slate-navy-harmony-complementary"
    },
    {
      "key": "analogous",
      "label": "Analogous",
      "behavior": "neighboring hue movement",
      "bestUse": "calm palettes, gradients, natural transitions",
      "description": "Analogous harmony uses hues close to the source color. It keeps the palette visually connected and is useful for quiet interfaces, editorial color systems, and smooth background or gradient work.",
      "colors": [
        {
          "hex": "#315E5E",
          "name": "#315E5E",
          "slug": null,
          "rgb": [
            49,
            94,
            94
          ],
          "hsl": [
            180,
            31,
            28
          ],
          "cmyk": [
            48,
            0,
            0,
            63
          ],
          "luminance": 0.0947,
          "contrast": {
            "black": 2.89,
            "white": 7.26
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/315e5e/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/315e5e.json"
        },
        {
          "hex": "#31315E",
          "name": "#31315E",
          "slug": null,
          "rgb": [
            49,
            49,
            94
          ],
          "hsl": [
            240,
            31,
            28
          ],
          "cmyk": [
            48,
            48,
            0,
            63
          ],
          "luminance": 0.0366,
          "contrast": {
            "black": 1.73,
            "white": 12.12
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/31315e/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/31315e.json"
        }
      ],
      "anchor": "slate-navy-harmony-analogous"
    },
    {
      "key": "triadic",
      "label": "Triadic",
      "behavior": "three evenly spaced hues",
      "bestUse": "balanced contrast, playful systems, broad palette range",
      "description": "Triadic harmony places colors around the wheel at equal intervals. It gives more range than analogous harmony while keeping a stable mathematical relationship between the selected hues.",
      "colors": [
        {
          "hex": "#5E3147",
          "name": "#5E3147",
          "slug": null,
          "rgb": [
            94,
            49,
            71
          ],
          "hsl": [
            331,
            31,
            28
          ],
          "cmyk": [
            0,
            48,
            24,
            63
          ],
          "luminance": 0.0503,
          "contrast": {
            "black": 2.01,
            "white": 10.47
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/5e3147/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e3147.json"
        },
        {
          "hex": "#475E31",
          "name": "#475E31",
          "slug": null,
          "rgb": [
            71,
            94,
            49
          ],
          "hsl": [
            91,
            31,
            28
          ],
          "cmyk": [
            24,
            0,
            48,
            63
          ],
          "luminance": 0.0957,
          "contrast": {
            "black": 2.91,
            "white": 7.21
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/475e31/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/475e31.json"
        }
      ],
      "anchor": "slate-navy-harmony-triadic"
    },
    {
      "key": "tetradic",
      "label": "Tetradic",
      "behavior": "two complementary pairs",
      "bestUse": "large design systems, dashboards, multi-state UI",
      "description": "Tetradic harmony creates a four-color system from two complementary relationships. It is useful when a palette needs multiple roles, but the colors should be assigned carefully so one hue remains dominant.",
      "colors": [
        {
          "hex": "#5E315E",
          "name": "#5E315E",
          "slug": null,
          "rgb": [
            94,
            49,
            94
          ],
          "hsl": [
            300,
            31,
            28
          ],
          "cmyk": [
            0,
            48,
            0,
            63
          ],
          "luminance": 0.0538,
          "contrast": {
            "black": 2.08,
            "white": 10.12
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/5e315e/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e315e.json"
        },
        {
          "hex": "#5E4731",
          "name": "#5E4731",
          "slug": null,
          "rgb": [
            94,
            71,
            49
          ],
          "hsl": [
            29,
            31,
            28
          ],
          "cmyk": [
            0,
            24,
            48,
            63
          ],
          "luminance": 0.0711,
          "contrast": {
            "black": 2.42,
            "white": 8.67
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/5e4731/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e4731.json"
        },
        {
          "hex": "#315E31",
          "name": "#315E31",
          "slug": null,
          "rgb": [
            49,
            94,
            49
          ],
          "hsl": [
            120,
            31,
            28
          ],
          "cmyk": [
            48,
            0,
            48,
            63
          ],
          "luminance": 0.0888,
          "contrast": {
            "black": 2.78,
            "white": 7.56
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/315e31/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/315e31.json"
        }
      ],
      "anchor": "slate-navy-harmony-tetradic"
    },
    {
      "key": "splitComplementary",
      "label": "Split Complementary",
      "behavior": "softened complementary contrast",
      "bestUse": "brand palettes, accent pairs, less aggressive contrast",
      "description": "Split-complementary harmony replaces the direct opposite with the two hues beside it. This keeps useful contrast while reducing the visual tension of a pure complementary pair.",
      "colors": [
        {
          "hex": "#5E3131",
          "name": "#5E3131",
          "slug": null,
          "rgb": [
            94,
            49,
            49
          ],
          "hsl": [
            0,
            31,
            28
          ],
          "cmyk": [
            0,
            48,
            48,
            63
          ],
          "luminance": 0.048,
          "contrast": {
            "black": 1.96,
            "white": 10.71
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/5e3131/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e3131.json"
        },
        {
          "hex": "#5E5E31",
          "name": "#5E5E31",
          "slug": null,
          "rgb": [
            94,
            94,
            49
          ],
          "hsl": [
            60,
            31,
            28
          ],
          "cmyk": [
            0,
            0,
            48,
            63
          ],
          "luminance": 0.1061,
          "contrast": {
            "black": 3.12,
            "white": 6.73
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/hex/5e5e31/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/5e5e31.json"
        }
      ],
      "anchor": "slate-navy-harmony-split-complementary"
    },
    {
      "key": "monochromatic",
      "label": "Monochromatic",
      "behavior": "same hue, different values",
      "bestUse": "surfaces, states, elevation, restrained UI themes",
      "description": "Monochromatic harmony keeps the source hue and changes lightness. It is the safest system for tonal UI, cards, hover states, shadows, backgrounds, and subtle visual hierarchy.",
      "colors": [
        {
          "hex": "#50759B",
          "name": "#50759B",
          "slug": null,
          "rgb": [
            80,
            117,
            155
          ],
          "hsl": [
            210,
            32,
            46
          ],
          "cmyk": [
            48,
            25,
            0,
            39
          ],
          "luminance": 0.1679,
          "contrast": {
            "black": 4.36,
            "white": 4.82
          },
          "wcag": {
            "AA": [
              "#FFFFFF"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/hex/50759b/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/50759b.json"
        },
        {
          "hex": "#30475E",
          "name": "Slate Navy",
          "slug": "slate-navy",
          "rgb": [
            48,
            71,
            94
          ],
          "hsl": [
            210,
            32,
            28
          ],
          "cmyk": [
            49,
            24,
            0,
            63
          ],
          "luminance": 0.0594,
          "contrast": {
            "black": 2.19,
            "white": 9.6
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/colors/slate-navy/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-navy.json"
        },
        {
          "hex": "#111922",
          "name": "#111922",
          "slug": null,
          "rgb": [
            17,
            25,
            34
          ],
          "hsl": [
            212,
            33,
            10
          ],
          "cmyk": [
            50,
            26,
            0,
            87
          ],
          "luminance": 0.0093,
          "contrast": {
            "black": 1.19,
            "white": 17.71
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/111922/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/111922.json"
        }
      ],
      "anchor": "slate-navy-harmony-monochromatic"
    }
  ],
  "signaturePalette": [
    "#30475E",
    "#5E4731",
    "#315E5E",
    "#31315E",
    "#50759B",
    "#111922"
  ],
  "semanticGroups": [
    "blue harmony",
    "cool harmony",
    "balanced harmony",
    "slate navy palette system"
  ],
  "useCases": [
    "palette generation",
    "brand color exploration",
    "UI accent planning",
    "CSS design tokens",
    "AI color retrieval"
  ],
  "accessibilityNotes": [
    "Black contrast on Slate Navy: 2.19:1",
    "White contrast on Slate Navy: 9.6:1",
    "AA text options: #FFFFFF, #F5F5F5"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/harmonies/slate-navy.json",
    "https://www.colorsencyclopedia.com/api/colors/slate-navy.json",
    "https://www.colorsencyclopedia.com/api/hex/30475e.json"
  ],
  "url": "https://www.colorsencyclopedia.com/harmonies/slate-navy/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/harmonies/slate-navy.json",
  "cssSnippet": ":root {\n  --color-slate-navy: #30475E;\n  --slate-navy-complementary-1: #5E4731;\n  --slate-navy-analogous-1: #315E5E;\n  --slate-navy-analogous-2: #31315E;\n  --slate-navy-triadic-1: #5E3147;\n  --slate-navy-triadic-2: #475E31;\n  --slate-navy-tetradic-1: #5E315E;\n  --slate-navy-tetradic-2: #5E4731;\n  --slate-navy-tetradic-3: #315E31;\n  --slate-navy-split-complementary-1: #5E3131;\n  --slate-navy-split-complementary-2: #5E5E31;\n  --slate-navy-monochromatic-1: #50759B;\n  --slate-navy-monochromatic-2: #30475E;\n  --slate-navy-monochromatic-3: #111922;\n}\n\n.palette-slate-navy-harmony {\n  color: #FFFFFF;\n  background: linear-gradient(135deg, #30475E, #5E4731, #315E5E, #31315E, #50759B, #111922);\n}"
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

CSS Harmony Tokens

Use these tokens when Slate Navy needs a complete palette system instead of a single color variable.

:root {
  --color-slate-navy: #30475E;
  --slate-navy-complementary-1: #5E4731;
  --slate-navy-analogous-1: #315E5E;
  --slate-navy-analogous-2: #31315E;
  --slate-navy-triadic-1: #5E3147;
  --slate-navy-triadic-2: #475E31;
  --slate-navy-tetradic-1: #5E315E;
  --slate-navy-tetradic-2: #5E4731;
  --slate-navy-tetradic-3: #315E31;
  --slate-navy-split-complementary-1: #5E3131;
  --slate-navy-split-complementary-2: #5E5E31;
  --slate-navy-monochromatic-1: #50759B;
  --slate-navy-monochromatic-2: #30475E;
  --slate-navy-monochromatic-3: #111922;
}

.palette-slate-navy-harmony {
  color: #FFFFFF;
  background: linear-gradient(135deg, #30475E, #5E4731, #315E5E, #31315E, #50759B, #111922);
}

Slate Navy Harmony Groups

Open a group to inspect its generated colors, intended behavior, and best design use. Anchor links above open the matching group directly.

Complementary Harmony1 colors · maximum hue contrast

Complementary harmony uses the color opposite the source hue. It creates the strongest direct relationship in the wheel, so it is best for accents, contrast anchors, and palettes that need immediate separation.

Behaviormaximum hue contrast
Best useaccent colors, strong calls to action, visual opposition
Source colorSlate Navy · #30475E
#5E4731#5E4731
Analogous Harmony2 colors · neighboring hue movement

Analogous harmony uses hues close to the source color. It keeps the palette visually connected and is useful for quiet interfaces, editorial color systems, and smooth background or gradient work.

Behaviorneighboring hue movement
Best usecalm palettes, gradients, natural transitions
Source colorSlate Navy · #30475E
#315E5E#315E5E
#31315E#31315E
Triadic Harmony2 colors · three evenly spaced hues

Triadic harmony places colors around the wheel at equal intervals. It gives more range than analogous harmony while keeping a stable mathematical relationship between the selected hues.

Behaviorthree evenly spaced hues
Best usebalanced contrast, playful systems, broad palette range
Source colorSlate Navy · #30475E
#5E3147#5E3147
#475E31#475E31
Tetradic Harmony3 colors · two complementary pairs

Tetradic harmony creates a four-color system from two complementary relationships. It is useful when a palette needs multiple roles, but the colors should be assigned carefully so one hue remains dominant.

Behaviortwo complementary pairs
Best uselarge design systems, dashboards, multi-state UI
Source colorSlate Navy · #30475E
#5E315E#5E315E
#5E4731#5E4731
#315E31#315E31
Split Complementary Harmony2 colors · softened complementary contrast

Split-complementary harmony replaces the direct opposite with the two hues beside it. This keeps useful contrast while reducing the visual tension of a pure complementary pair.

Behaviorsoftened complementary contrast
Best usebrand palettes, accent pairs, less aggressive contrast
Source colorSlate Navy · #30475E
#5E3131#5E3131
#5E5E31#5E5E31
Monochromatic Harmony3 colors · same hue, different values

Monochromatic harmony keeps the source hue and changes lightness. It is the safest system for tonal UI, cards, hover states, shadows, backgrounds, and subtle visual hierarchy.

Behaviorsame hue, different values
Best usesurfaces, states, elevation, restrained UI themes
Source colorSlate Navy · #30475E
#50759B#50759B
Slate Navy#30475E
#111922#111922

Related Harmony Guides

Slate Navy color referenceOpen the main color page with conversions, CSS, JSON, WCAG, variants, and related colors.Slate Navy harmonies JSONOpen the machine-readable harmony dataset.Slate Navy color APIOpen the complete source color entity JSON.Slate Navy paletteSee the generated palette system based on this color.Blue colorsBrowse related named colors in the blue family.Cool colorsExplore cool colors across the editorial dataset.Balanced colorsExplore balanced colors with similar visual behavior.