Colors Encyclopedia

Harmony system

River Stone Color Harmonies

River Stone harmonies from #7E8A8A: complementary #8B7E7E, plus five harmony groups with CSS and contrast data.

River Stone is a neutral gray at hue 180°, saturation 5% and lightness 52%. The sets below keep those measurements visible while moving around the color wheel, making it easier to choose close hues, direct contrast or a wider token system.

JSON data ComplementaryAnalogousTriadicTetradicSplit ComplementaryMonochromatic
SourceRiver Stone · #7E8A8A
Groups6
Palette colors6
FamilyGray

How the harmony works

River Stone Harmony Guide

River Stone 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 River Stone Harmony Data (JSON)

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

AI-Ready Dataset v1.0.0
Luminance0.2445
Black text5.89:1AA Pass
White text3.57:1AA Fail
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": "river-stone",
  "name": "River Stone",
  "hex": "#7E8A8A",
  "url": "https://www.colorsencyclopedia.com/colors/river-stone/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/colors/river-stone.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": "#8B7E7E",
        "name": "#8B7E7E",
        "slug": null,
        "rgb": [
          139,
          126,
          126
        ],
        "hsl": [
          0,
          5,
          52
        ],
        "cmyk": [
          0,
          9,
          9,
          45
        ],
        "luminance": 0.2192,
        "contrast": {
          "black": 5.38,
          "white": 3.9
        },
        "wcag": {
          "AA": [
            "#000000"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      }
    ],
    "anchor": "river-stone-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": "#7E8B85",
        "name": "#7E8B85",
        "slug": null,
        "rgb": [
          126,
          139,
          133
        ],
        "hsl": [
          152,
          5,
          52
        ],
        "cmyk": [
          9,
          0,
          4,
          45
        ],
        "luminance": 0.2459,
        "contrast": {
          "black": 5.92,
          "white": 3.55
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      },
      {
        "hex": "#7E858B",
        "name": "#7E858B",
        "slug": null,
        "rgb": [
          126,
          133,
          139
        ],
        "hsl": [
          208,
          5,
          52
        ],
        "cmyk": [
          9,
          4,
          0,
          45
        ],
        "luminance": 0.2307,
        "contrast": {
          "black": 5.61,
          "white": 3.74
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      }
    ],
    "anchor": "river-stone-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": "#8B7E8B",
        "name": "#8B7E8B",
        "slug": null,
        "rgb": [
          139,
          126,
          139
        ],
        "hsl": [
          300,
          5,
          52
        ],
        "cmyk": [
          0,
          9,
          0,
          45
        ],
        "luminance": 0.2227,
        "contrast": {
          "black": 5.45,
          "white": 3.85
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      },
      {
        "hex": "#8B8B7E",
        "name": "#8B8B7E",
        "slug": null,
        "rgb": [
          139,
          139,
          126
        ],
        "hsl": [
          60,
          5,
          52
        ],
        "cmyk": [
          0,
          0,
          9,
          45
        ],
        "luminance": 0.2546,
        "contrast": {
          "black": 6.09,
          "white": 3.45
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      }
    ],
    "anchor": "river-stone-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": "#857E8B",
        "name": "#857E8B",
        "slug": null,
        "rgb": [
          133,
          126,
          139
        ],
        "hsl": [
          272,
          5,
          52
        ],
        "cmyk": [
          4,
          9,
          0,
          45
        ],
        "luminance": 0.2177,
        "contrast": {
          "black": 5.35,
          "white": 3.92
        },
        "wcag": {
          "AA": [
            "#000000"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      },
      {
        "hex": "#8B7E7E",
        "name": "#8B7E7E",
        "slug": null,
        "rgb": [
          139,
          126,
          126
        ],
        "hsl": [
          0,
          5,
          52
        ],
        "cmyk": [
          0,
          9,
          9,
          45
        ],
        "luminance": 0.2192,
        "contrast": {
          "black": 5.38,
          "white": 3.9
        },
        "wcag": {
          "AA": [
            "#000000"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      },
      {
        "hex": "#858B7E",
        "name": "#858B7E",
        "slug": null,
        "rgb": [
          133,
          139,
          126
        ],
        "hsl": [
          88,
          5,
          52
        ],
        "cmyk": [
          4,
          0,
          9,
          45
        ],
        "luminance": 0.2496,
        "contrast": {
          "black": 5.99,
          "white": 3.5
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      }
    ],
    "anchor": "river-stone-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": "#8B7E85",
        "name": "#8B7E85",
        "slug": null,
        "rgb": [
          139,
          126,
          133
        ],
        "hsl": [
          328,
          5,
          52
        ],
        "cmyk": [
          0,
          9,
          4,
          45
        ],
        "luminance": 0.221,
        "contrast": {
          "black": 5.42,
          "white": 3.87
        },
        "wcag": {
          "AA": [
            "#000000"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      },
      {
        "hex": "#8B857E",
        "name": "#8B857E",
        "slug": null,
        "rgb": [
          139,
          133,
          126
        ],
        "hsl": [
          32,
          5,
          52
        ],
        "cmyk": [
          0,
          4,
          9,
          45
        ],
        "luminance": 0.2377,
        "contrast": {
          "black": 5.75,
          "white": 3.65
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      }
    ],
    "anchor": "river-stone-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": "#AFB6B6",
        "name": "#AFB6B6",
        "slug": null,
        "rgb": [
          175,
          182,
          182
        ],
        "hsl": [
          180,
          5,
          70
        ],
        "cmyk": [
          4,
          0,
          0,
          29
        ],
        "luminance": 0.4595,
        "contrast": {
          "black": 10.19,
          "white": 2.06
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ],
          "AAA": [
            "#000000",
            "#1A1A1A"
          ]
        },
        "url": null,
        "apiUrl": null
      },
      {
        "hex": "#7E8A8A",
        "name": "River Stone",
        "slug": "river-stone",
        "rgb": [
          126,
          138,
          138
        ],
        "hsl": [
          180,
          5,
          52
        ],
        "cmyk": [
          9,
          0,
          0,
          46
        ],
        "luminance": 0.2445,
        "contrast": {
          "black": 5.89,
          "white": 3.57
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/colors/river-stone/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/river-stone.json"
      },
      {
        "hex": "#525B5B",
        "name": "#525B5B",
        "slug": null,
        "rgb": [
          82,
          91,
          91
        ],
        "hsl": [
          180,
          5,
          34
        ],
        "cmyk": [
          10,
          0,
          0,
          64
        ],
        "luminance": 0.1003,
        "contrast": {
          "black": 3.01,
          "white": 6.99
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": []
        },
        "url": null,
        "apiUrl": null
      }
    ],
    "anchor": "river-stone-harmony-monochromatic"
  }
]
Signature palette
[
  "#7E8A8A",
  "#8B7E7E",
  "#7E8B85",
  "#7E858B",
  "#AFB6B6",
  "#525B5B"
]
Accessibility notes
[
  "Black contrast on River Stone: 5.89:1",
  "White contrast on River Stone: 3.57:1",
  "AA text options: #000000, #1A1A1A"
]
CSS tokens
":root {\n  --color-river-stone: #7E8A8A;\n  --river-stone-complementary-1: #8B7E7E;\n  --river-stone-analogous-1: #7E8B85;\n  --river-stone-analogous-2: #7E858B;\n  --river-stone-triadic-1: #8B7E8B;\n  --river-stone-triadic-2: #8B8B7E;\n  --river-stone-tetradic-1: #857E8B;\n  --river-stone-tetradic-2: #8B7E7E;\n  --river-stone-tetradic-3: #858B7E;\n  --river-stone-split-complementary-1: #8B7E85;\n  --river-stone-split-complementary-2: #8B857E;\n  --river-stone-monochromatic-1: #AFB6B6;\n  --river-stone-monochromatic-2: #7E8A8A;\n  --river-stone-monochromatic-3: #525B5B;\n}\n\n.palette-river-stone-harmony {\n  color: #111827;\n  background: linear-gradient(135deg, #7E8A8A, #8B7E7E, #7E8B85, #7E858B, #AFB6B6, #525B5B);\n}"
Full JSON dataset 
{
  "datasetVersion": "1.0.0",
  "slug": "river-stone",
  "name": "River Stone",
  "hex": "#7E8A8A",
  "rgb": [
    126,
    138,
    138
  ],
  "hsl": [
    180,
    5,
    52
  ],
  "cmyk": [
    9,
    0,
    0,
    46
  ],
  "family": "gray",
  "temperature": "neutral",
  "tone": [
    "muted"
  ],
  "luminance": 0.2445,
  "contrast": {
    "black": 5.89,
    "white": 3.57
  },
  "wcag": {
    "AA": [
      "#000000",
      "#1A1A1A"
    ],
    "AAA": []
  },
  "sourceColor": {
    "slug": "river-stone",
    "name": "River Stone",
    "hex": "#7E8A8A",
    "url": "https://www.colorsencyclopedia.com/colors/river-stone/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/river-stone.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": "#8B7E7E",
          "name": "#8B7E7E",
          "slug": null,
          "rgb": [
            139,
            126,
            126
          ],
          "hsl": [
            0,
            5,
            52
          ],
          "cmyk": [
            0,
            9,
            9,
            45
          ],
          "luminance": 0.2192,
          "contrast": {
            "black": 5.38,
            "white": 3.9
          },
          "wcag": {
            "AA": [
              "#000000"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        }
      ],
      "anchor": "river-stone-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": "#7E8B85",
          "name": "#7E8B85",
          "slug": null,
          "rgb": [
            126,
            139,
            133
          ],
          "hsl": [
            152,
            5,
            52
          ],
          "cmyk": [
            9,
            0,
            4,
            45
          ],
          "luminance": 0.2459,
          "contrast": {
            "black": 5.92,
            "white": 3.55
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        },
        {
          "hex": "#7E858B",
          "name": "#7E858B",
          "slug": null,
          "rgb": [
            126,
            133,
            139
          ],
          "hsl": [
            208,
            5,
            52
          ],
          "cmyk": [
            9,
            4,
            0,
            45
          ],
          "luminance": 0.2307,
          "contrast": {
            "black": 5.61,
            "white": 3.74
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        }
      ],
      "anchor": "river-stone-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": "#8B7E8B",
          "name": "#8B7E8B",
          "slug": null,
          "rgb": [
            139,
            126,
            139
          ],
          "hsl": [
            300,
            5,
            52
          ],
          "cmyk": [
            0,
            9,
            0,
            45
          ],
          "luminance": 0.2227,
          "contrast": {
            "black": 5.45,
            "white": 3.85
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        },
        {
          "hex": "#8B8B7E",
          "name": "#8B8B7E",
          "slug": null,
          "rgb": [
            139,
            139,
            126
          ],
          "hsl": [
            60,
            5,
            52
          ],
          "cmyk": [
            0,
            0,
            9,
            45
          ],
          "luminance": 0.2546,
          "contrast": {
            "black": 6.09,
            "white": 3.45
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        }
      ],
      "anchor": "river-stone-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": "#857E8B",
          "name": "#857E8B",
          "slug": null,
          "rgb": [
            133,
            126,
            139
          ],
          "hsl": [
            272,
            5,
            52
          ],
          "cmyk": [
            4,
            9,
            0,
            45
          ],
          "luminance": 0.2177,
          "contrast": {
            "black": 5.35,
            "white": 3.92
          },
          "wcag": {
            "AA": [
              "#000000"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        },
        {
          "hex": "#8B7E7E",
          "name": "#8B7E7E",
          "slug": null,
          "rgb": [
            139,
            126,
            126
          ],
          "hsl": [
            0,
            5,
            52
          ],
          "cmyk": [
            0,
            9,
            9,
            45
          ],
          "luminance": 0.2192,
          "contrast": {
            "black": 5.38,
            "white": 3.9
          },
          "wcag": {
            "AA": [
              "#000000"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        },
        {
          "hex": "#858B7E",
          "name": "#858B7E",
          "slug": null,
          "rgb": [
            133,
            139,
            126
          ],
          "hsl": [
            88,
            5,
            52
          ],
          "cmyk": [
            4,
            0,
            9,
            45
          ],
          "luminance": 0.2496,
          "contrast": {
            "black": 5.99,
            "white": 3.5
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        }
      ],
      "anchor": "river-stone-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": "#8B7E85",
          "name": "#8B7E85",
          "slug": null,
          "rgb": [
            139,
            126,
            133
          ],
          "hsl": [
            328,
            5,
            52
          ],
          "cmyk": [
            0,
            9,
            4,
            45
          ],
          "luminance": 0.221,
          "contrast": {
            "black": 5.42,
            "white": 3.87
          },
          "wcag": {
            "AA": [
              "#000000"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        },
        {
          "hex": "#8B857E",
          "name": "#8B857E",
          "slug": null,
          "rgb": [
            139,
            133,
            126
          ],
          "hsl": [
            32,
            5,
            52
          ],
          "cmyk": [
            0,
            4,
            9,
            45
          ],
          "luminance": 0.2377,
          "contrast": {
            "black": 5.75,
            "white": 3.65
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        }
      ],
      "anchor": "river-stone-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": "#AFB6B6",
          "name": "#AFB6B6",
          "slug": null,
          "rgb": [
            175,
            182,
            182
          ],
          "hsl": [
            180,
            5,
            70
          ],
          "cmyk": [
            4,
            0,
            0,
            29
          ],
          "luminance": 0.4595,
          "contrast": {
            "black": 10.19,
            "white": 2.06
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ],
            "AAA": [
              "#000000",
              "#1A1A1A"
            ]
          },
          "url": null,
          "apiUrl": null
        },
        {
          "hex": "#7E8A8A",
          "name": "River Stone",
          "slug": "river-stone",
          "rgb": [
            126,
            138,
            138
          ],
          "hsl": [
            180,
            5,
            52
          ],
          "cmyk": [
            9,
            0,
            0,
            46
          ],
          "luminance": 0.2445,
          "contrast": {
            "black": 5.89,
            "white": 3.57
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/colors/river-stone/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/river-stone.json"
        },
        {
          "hex": "#525B5B",
          "name": "#525B5B",
          "slug": null,
          "rgb": [
            82,
            91,
            91
          ],
          "hsl": [
            180,
            5,
            34
          ],
          "cmyk": [
            10,
            0,
            0,
            64
          ],
          "luminance": 0.1003,
          "contrast": {
            "black": 3.01,
            "white": 6.99
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": []
          },
          "url": null,
          "apiUrl": null
        }
      ],
      "anchor": "river-stone-harmony-monochromatic"
    }
  ],
  "signaturePalette": [
    "#7E8A8A",
    "#8B7E7E",
    "#7E8B85",
    "#7E858B",
    "#AFB6B6",
    "#525B5B"
  ],
  "semanticGroups": [
    "gray harmony",
    "neutral harmony",
    "muted harmony",
    "river stone palette system"
  ],
  "useCases": [
    "palette generation",
    "brand color exploration",
    "UI accent planning",
    "CSS design tokens",
    "AI color retrieval"
  ],
  "accessibilityNotes": [
    "Black contrast on River Stone: 5.89:1",
    "White contrast on River Stone: 3.57:1",
    "AA text options: #000000, #1A1A1A"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/harmonies/river-stone.json",
    "https://www.colorsencyclopedia.com/api/colors/river-stone.json",
    "https://www.colorsencyclopedia.com/api/hex/7e8a8a.json"
  ],
  "url": "https://www.colorsencyclopedia.com/harmonies/river-stone/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/harmonies/river-stone.json",
  "cssSnippet": ":root {\n  --color-river-stone: #7E8A8A;\n  --river-stone-complementary-1: #8B7E7E;\n  --river-stone-analogous-1: #7E8B85;\n  --river-stone-analogous-2: #7E858B;\n  --river-stone-triadic-1: #8B7E8B;\n  --river-stone-triadic-2: #8B8B7E;\n  --river-stone-tetradic-1: #857E8B;\n  --river-stone-tetradic-2: #8B7E7E;\n  --river-stone-tetradic-3: #858B7E;\n  --river-stone-split-complementary-1: #8B7E85;\n  --river-stone-split-complementary-2: #8B857E;\n  --river-stone-monochromatic-1: #AFB6B6;\n  --river-stone-monochromatic-2: #7E8A8A;\n  --river-stone-monochromatic-3: #525B5B;\n}\n\n.palette-river-stone-harmony {\n  color: #111827;\n  background: linear-gradient(135deg, #7E8A8A, #8B7E7E, #7E8B85, #7E858B, #AFB6B6, #525B5B);\n}"
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

CSS Harmony Tokens

Use these tokens when River Stone needs a complete palette system instead of a single color variable.

:root {
  --color-river-stone: #7E8A8A;
  --river-stone-complementary-1: #8B7E7E;
  --river-stone-analogous-1: #7E8B85;
  --river-stone-analogous-2: #7E858B;
  --river-stone-triadic-1: #8B7E8B;
  --river-stone-triadic-2: #8B8B7E;
  --river-stone-tetradic-1: #857E8B;
  --river-stone-tetradic-2: #8B7E7E;
  --river-stone-tetradic-3: #858B7E;
  --river-stone-split-complementary-1: #8B7E85;
  --river-stone-split-complementary-2: #8B857E;
  --river-stone-monochromatic-1: #AFB6B6;
  --river-stone-monochromatic-2: #7E8A8A;
  --river-stone-monochromatic-3: #525B5B;
}

.palette-river-stone-harmony {
  color: #111827;
  background: linear-gradient(135deg, #7E8A8A, #8B7E7E, #7E8B85, #7E858B, #AFB6B6, #525B5B);
}

River Stone 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

The complementary set starts from River Stone #7E8A8A and produces #8B7E7E. Its maximum hue contrast relationship suits accent colors, strong calls to action, and visual opposition. None of these generated values has an exact named-color match in the current dataset.

Behaviormaximum hue contrast
Best useaccent colors, strong calls to action, visual opposition
Source colorRiver Stone · #7E8A8A
#8B7E7E#8B7E7E
Analogous Harmony2 colors · neighboring hue movement

The analogous set starts from River Stone #7E8A8A and produces #7E8B85 and #7E858B. Its neighboring hue movement relationship suits calm palettes, gradients, and natural transitions. None of these generated values has an exact named-color match in the current dataset.

Behaviorneighboring hue movement
Best usecalm palettes, gradients, natural transitions
Source colorRiver Stone · #7E8A8A
#7E8B85#7E8B85
#7E858B#7E858B
Triadic Harmony2 colors · three evenly spaced hues

The triadic set starts from River Stone #7E8A8A and produces #8B7E8B and #8B8B7E. Its three evenly spaced hues relationship suits balanced contrast, playful systems, and broad palette range. None of these generated values has an exact named-color match in the current dataset.

Behaviorthree evenly spaced hues
Best usebalanced contrast, playful systems, broad palette range
Source colorRiver Stone · #7E8A8A
#8B7E8B#8B7E8B
#8B8B7E#8B8B7E
Tetradic Harmony3 colors · two complementary pairs

The tetradic set starts from River Stone #7E8A8A and produces #857E8B, #8B7E7E, and #858B7E. Its two complementary pairs relationship suits large design systems, dashboards, and multi-state UI. None of these generated values has an exact named-color match in the current dataset.

Behaviortwo complementary pairs
Best uselarge design systems, dashboards, multi-state UI
Source colorRiver Stone · #7E8A8A
#857E8B#857E8B
#8B7E7E#8B7E7E
#858B7E#858B7E
Split Complementary Harmony2 colors · softened complementary contrast

The split complementary set starts from River Stone #7E8A8A and produces #8B7E85 and #8B857E. Its softened complementary contrast relationship suits brand palettes, accent pairs, and less aggressive contrast. None of these generated values has an exact named-color match in the current dataset.

Behaviorsoftened complementary contrast
Best usebrand palettes, accent pairs, less aggressive contrast
Source colorRiver Stone · #7E8A8A
#8B7E85#8B7E85
#8B857E#8B857E
Monochromatic Harmony3 colors · same hue, different values

The monochromatic set starts from River Stone #7E8A8A and produces #AFB6B6, #7E8A8A, and #525B5B. Its same hue, different values relationship suits surfaces, states, elevation, and restrained UI themes. The generated values match River Stone in the named-color dataset.

Behaviorsame hue, different values
Best usesurfaces, states, elevation, restrained UI themes
Source colorRiver Stone · #7E8A8A
#AFB6B6#AFB6B6
River Stone#7E8A8A
#525B5B#525B5B

Related Harmony Guides

River Stone color referenceOpen the main color page with conversions, CSS, JSON, WCAG, variants, and related colors.River Stone harmonies JSONOpen the machine-readable harmony dataset.River Stone color APIOpen the complete source color entity JSON.River Stone paletteSee the generated palette system based on this color.Gray colorsBrowse related named colors in the gray family.Neutral colorsExplore neutral colors across the editorial dataset.Muted colorsExplore muted colors with similar visual behavior.