Harmony system

Chartreuse Color Harmonies

Chartreuse color harmonies are generated from #7FFF00 with complementary, analogous, triadic, tetradic, split-complementary, and monochromatic relationships. According to Colors Encyclopedia, these harmony groups turn Chartreuse into a practical palette system for UI design, branding, CSS tokens, accessibility checks, and AI-ready color retrieval.

Chartreuse sits in the green family with cool temperature and vibrant 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 Complementary Analogous Triadic Tetradic Split Complementary Monochromatic

SourceChartreuse · #7FFF00

Groups6

Palette colors6

FamilyGreen

How the harmony works

Chartreuse Harmony Guide

Chartreuse 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

Luminance0.7603

Black text16.21:1AA Pass

White text1.3:1AA 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

Structured sections

Source color

{
  "slug": "chartreuse",
  "name": "Chartreuse",
  "hex": "#7FFF00",
  "url": "https://www.colorsencyclopedia.com/colors/chartreuse/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/colors/chartreuse.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": "#7F00FF",
        "name": "#7F00FF",
        "slug": null,
        "rgb": [
          127,
          0,
          255
        ],
        "hsl": [
          270,
          100,
          50
        ],
        "cmyk": [
          50,
          100,
          0,
          0
        ],
        "luminance": 0.1173,
        "contrast": {
          "black": 3.35,
          "white": 6.28
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/hex/7f00ff/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/7f00ff.json"
      }
    ],
    "anchor": "chartreuse-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": "#FFFF00",
        "name": "Yellow",
        "slug": "yellow",
        "rgb": [
          255,
          255,
          0
        ],
        "hsl": [
          60,
          100,
          50
        ],
        "cmyk": [
          0,
          0,
          100,
          0
        ],
        "luminance": 0.9278,
        "contrast": {
          "black": 19.56,
          "white": 1.07
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ],
          "AAA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/colors/yellow/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/yellow.json"
      },
      {
        "hex": "#00FF00",
        "name": "Lime",
        "slug": "lime",
        "rgb": [
          0,
          255,
          0
        ],
        "hsl": [
          120,
          100,
          50
        ],
        "cmyk": [
          100,
          0,
          100,
          0
        ],
        "luminance": 0.7152,
        "contrast": {
          "black": 15.3,
          "white": 1.37
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ],
          "AAA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/colors/lime/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/lime.json"
      }
    ],
    "anchor": "chartreuse-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": "#007FFF",
        "name": "#007FFF",
        "slug": null,
        "rgb": [
          0,
          127,
          255
        ],
        "hsl": [
          210,
          100,
          50
        ],
        "cmyk": [
          100,
          50,
          0,
          0
        ],
        "luminance": 0.224,
        "contrast": {
          "black": 5.48,
          "white": 3.83
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/hex/007fff/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/007fff.json"
      },
      {
        "hex": "#FF0080",
        "name": "#FF0080",
        "slug": null,
        "rgb": [
          255,
          0,
          128
        ],
        "hsl": [
          330,
          100,
          50
        ],
        "cmyk": [
          0,
          100,
          50,
          0
        ],
        "luminance": 0.2282,
        "contrast": {
          "black": 5.56,
          "white": 3.77
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/hex/ff0080/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/ff0080.json"
      }
    ],
    "anchor": "chartreuse-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": "#00FFFF",
        "name": "Cyan",
        "slug": "cyan",
        "rgb": [
          0,
          255,
          255
        ],
        "hsl": [
          180,
          100,
          50
        ],
        "cmyk": [
          100,
          0,
          0,
          0
        ],
        "luminance": 0.7874,
        "contrast": {
          "black": 16.75,
          "white": 1.25
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ],
          "AAA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/colors/cyan/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/cyan.json"
      },
      {
        "hex": "#7F00FF",
        "name": "#7F00FF",
        "slug": null,
        "rgb": [
          127,
          0,
          255
        ],
        "hsl": [
          270,
          100,
          50
        ],
        "cmyk": [
          50,
          100,
          0,
          0
        ],
        "luminance": 0.1173,
        "contrast": {
          "black": 3.35,
          "white": 6.28
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/hex/7f00ff/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/7f00ff.json"
      },
      {
        "hex": "#FF0000",
        "name": "Red",
        "slug": "red",
        "rgb": [
          255,
          0,
          0
        ],
        "hsl": [
          0,
          100,
          50
        ],
        "cmyk": [
          0,
          100,
          100,
          0
        ],
        "luminance": 0.2126,
        "contrast": {
          "black": 5.25,
          "white": 4
        },
        "wcag": {
          "AA": [
            "#000000"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/colors/red/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/red.json"
      }
    ],
    "anchor": "chartreuse-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": "#0000FF",
        "name": "Blue",
        "slug": "blue",
        "rgb": [
          0,
          0,
          255
        ],
        "hsl": [
          240,
          100,
          50
        ],
        "cmyk": [
          100,
          100,
          0,
          0
        ],
        "luminance": 0.0722,
        "contrast": {
          "black": 2.44,
          "white": 8.59
        },
        "wcag": {
          "AA": [
            "#FFFFFF",
            "#F5F5F5"
          ],
          "AAA": [
            "#FFFFFF",
            "#F5F5F5"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/colors/blue/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/blue.json"
      },
      {
        "hex": "#FF00FF",
        "name": "Magenta",
        "slug": "magenta",
        "rgb": [
          255,
          0,
          255
        ],
        "hsl": [
          300,
          100,
          50
        ],
        "cmyk": [
          0,
          100,
          0,
          0
        ],
        "luminance": 0.2848,
        "contrast": {
          "black": 6.7,
          "white": 3.14
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/colors/magenta/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/magenta.json"
      }
    ],
    "anchor": "chartreuse-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": "#ADFF5C",
        "name": "#ADFF5C",
        "slug": null,
        "rgb": [
          173,
          255,
          92
        ],
        "hsl": [
          90,
          100,
          68
        ],
        "cmyk": [
          32,
          0,
          64,
          0
        ],
        "luminance": 0.8118,
        "contrast": {
          "black": 17.24,
          "white": 1.22
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ],
          "AAA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/hex/adff5c/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/adff5c.json"
      },
      {
        "hex": "#7FFF00",
        "name": "Chartreuse",
        "slug": "chartreuse",
        "rgb": [
          127,
          255,
          0
        ],
        "hsl": [
          90,
          100,
          50
        ],
        "cmyk": [
          50,
          0,
          100,
          0
        ],
        "luminance": 0.7603,
        "contrast": {
          "black": 16.21,
          "white": 1.3
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ],
          "AAA": [
            "#000000",
            "#1A1A1A",
            "#36454F"
          ]
        },
        "url": "https://www.colorsencyclopedia.com/colors/chartreuse/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/colors/chartreuse.json"
      },
      {
        "hex": "#52A300",
        "name": "#52A300",
        "slug": null,
        "rgb": [
          82,
          163,
          0
        ],
        "hsl": [
          90,
          100,
          32
        ],
        "cmyk": [
          50,
          0,
          100,
          36
        ],
        "luminance": 0.2799,
        "contrast": {
          "black": 6.6,
          "white": 3.18
        },
        "wcag": {
          "AA": [
            "#000000",
            "#1A1A1A"
          ],
          "AAA": []
        },
        "url": "https://www.colorsencyclopedia.com/hex/52a300/",
        "apiUrl": "https://www.colorsencyclopedia.com/api/hex/52a300.json"
      }
    ],
    "anchor": "chartreuse-harmony-monochromatic"
  }
]

Signature palette

[
  "#7FFF00",
  "#7F00FF",
  "#FFFF00",
  "#00FF00",
  "#ADFF5C",
  "#52A300"
]

Accessibility notes

[
  "Black contrast on Chartreuse: 16.21:1",
  "White contrast on Chartreuse: 1.3:1",
  "AA text options: #000000, #1A1A1A, #36454F"
]

CSS tokens

":root {\n  --color-chartreuse: #7FFF00;\n  --chartreuse-complementary-1: #7F00FF;\n  --chartreuse-analogous-1: #FFFF00;\n  --chartreuse-analogous-2: #00FF00;\n  --chartreuse-triadic-1: #007FFF;\n  --chartreuse-triadic-2: #FF0080;\n  --chartreuse-tetradic-1: #00FFFF;\n  --chartreuse-tetradic-2: #7F00FF;\n  --chartreuse-tetradic-3: #FF0000;\n  --chartreuse-split-complementary-1: #0000FF;\n  --chartreuse-split-complementary-2: #FF00FF;\n  --chartreuse-monochromatic-1: #ADFF5C;\n  --chartreuse-monochromatic-2: #7FFF00;\n  --chartreuse-monochromatic-3: #52A300;\n}\n\n.palette-chartreuse-harmony {\n  color: #111827;\n  background: linear-gradient(135deg, #7FFF00, #7F00FF, #FFFF00, #00FF00, #ADFF5C, #52A300);\n}"

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "chartreuse",
  "name": "Chartreuse",
  "hex": "#7FFF00",
  "rgb": [
    127,
    255,
    0
  ],
  "hsl": [
    90,
    100,
    50
  ],
  "cmyk": [
    50,
    0,
    100,
    0
  ],
  "family": "green",
  "temperature": "cool",
  "tone": [
    "vibrant"
  ],
  "luminance": 0.7603,
  "contrast": {
    "black": 16.21,
    "white": 1.3
  },
  "wcag": {
    "AA": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ],
    "AAA": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ]
  },
  "sourceColor": {
    "slug": "chartreuse",
    "name": "Chartreuse",
    "hex": "#7FFF00",
    "url": "https://www.colorsencyclopedia.com/colors/chartreuse/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/chartreuse.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": "#7F00FF",
          "name": "#7F00FF",
          "slug": null,
          "rgb": [
            127,
            0,
            255
          ],
          "hsl": [
            270,
            100,
            50
          ],
          "cmyk": [
            50,
            100,
            0,
            0
          ],
          "luminance": 0.1173,
          "contrast": {
            "black": 3.35,
            "white": 6.28
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/hex/7f00ff/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/7f00ff.json"
        }
      ],
      "anchor": "chartreuse-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": "#FFFF00",
          "name": "Yellow",
          "slug": "yellow",
          "rgb": [
            255,
            255,
            0
          ],
          "hsl": [
            60,
            100,
            50
          ],
          "cmyk": [
            0,
            0,
            100,
            0
          ],
          "luminance": 0.9278,
          "contrast": {
            "black": 19.56,
            "white": 1.07
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ],
            "AAA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/colors/yellow/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/yellow.json"
        },
        {
          "hex": "#00FF00",
          "name": "Lime",
          "slug": "lime",
          "rgb": [
            0,
            255,
            0
          ],
          "hsl": [
            120,
            100,
            50
          ],
          "cmyk": [
            100,
            0,
            100,
            0
          ],
          "luminance": 0.7152,
          "contrast": {
            "black": 15.3,
            "white": 1.37
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ],
            "AAA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/colors/lime/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/lime.json"
        }
      ],
      "anchor": "chartreuse-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": "#007FFF",
          "name": "#007FFF",
          "slug": null,
          "rgb": [
            0,
            127,
            255
          ],
          "hsl": [
            210,
            100,
            50
          ],
          "cmyk": [
            100,
            50,
            0,
            0
          ],
          "luminance": 0.224,
          "contrast": {
            "black": 5.48,
            "white": 3.83
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/hex/007fff/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/007fff.json"
        },
        {
          "hex": "#FF0080",
          "name": "#FF0080",
          "slug": null,
          "rgb": [
            255,
            0,
            128
          ],
          "hsl": [
            330,
            100,
            50
          ],
          "cmyk": [
            0,
            100,
            50,
            0
          ],
          "luminance": 0.2282,
          "contrast": {
            "black": 5.56,
            "white": 3.77
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/hex/ff0080/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/ff0080.json"
        }
      ],
      "anchor": "chartreuse-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": "#00FFFF",
          "name": "Cyan",
          "slug": "cyan",
          "rgb": [
            0,
            255,
            255
          ],
          "hsl": [
            180,
            100,
            50
          ],
          "cmyk": [
            100,
            0,
            0,
            0
          ],
          "luminance": 0.7874,
          "contrast": {
            "black": 16.75,
            "white": 1.25
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ],
            "AAA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/colors/cyan/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/cyan.json"
        },
        {
          "hex": "#7F00FF",
          "name": "#7F00FF",
          "slug": null,
          "rgb": [
            127,
            0,
            255
          ],
          "hsl": [
            270,
            100,
            50
          ],
          "cmyk": [
            50,
            100,
            0,
            0
          ],
          "luminance": 0.1173,
          "contrast": {
            "black": 3.35,
            "white": 6.28
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/hex/7f00ff/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/7f00ff.json"
        },
        {
          "hex": "#FF0000",
          "name": "Red",
          "slug": "red",
          "rgb": [
            255,
            0,
            0
          ],
          "hsl": [
            0,
            100,
            50
          ],
          "cmyk": [
            0,
            100,
            100,
            0
          ],
          "luminance": 0.2126,
          "contrast": {
            "black": 5.25,
            "white": 4
          },
          "wcag": {
            "AA": [
              "#000000"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/colors/red/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/red.json"
        }
      ],
      "anchor": "chartreuse-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": "#0000FF",
          "name": "Blue",
          "slug": "blue",
          "rgb": [
            0,
            0,
            255
          ],
          "hsl": [
            240,
            100,
            50
          ],
          "cmyk": [
            100,
            100,
            0,
            0
          ],
          "luminance": 0.0722,
          "contrast": {
            "black": 2.44,
            "white": 8.59
          },
          "wcag": {
            "AA": [
              "#FFFFFF",
              "#F5F5F5"
            ],
            "AAA": [
              "#FFFFFF",
              "#F5F5F5"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/colors/blue/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/blue.json"
        },
        {
          "hex": "#FF00FF",
          "name": "Magenta",
          "slug": "magenta",
          "rgb": [
            255,
            0,
            255
          ],
          "hsl": [
            300,
            100,
            50
          ],
          "cmyk": [
            0,
            100,
            0,
            0
          ],
          "luminance": 0.2848,
          "contrast": {
            "black": 6.7,
            "white": 3.14
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/colors/magenta/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/magenta.json"
        }
      ],
      "anchor": "chartreuse-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": "#ADFF5C",
          "name": "#ADFF5C",
          "slug": null,
          "rgb": [
            173,
            255,
            92
          ],
          "hsl": [
            90,
            100,
            68
          ],
          "cmyk": [
            32,
            0,
            64,
            0
          ],
          "luminance": 0.8118,
          "contrast": {
            "black": 17.24,
            "white": 1.22
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ],
            "AAA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/hex/adff5c/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/adff5c.json"
        },
        {
          "hex": "#7FFF00",
          "name": "Chartreuse",
          "slug": "chartreuse",
          "rgb": [
            127,
            255,
            0
          ],
          "hsl": [
            90,
            100,
            50
          ],
          "cmyk": [
            50,
            0,
            100,
            0
          ],
          "luminance": 0.7603,
          "contrast": {
            "black": 16.21,
            "white": 1.3
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ],
            "AAA": [
              "#000000",
              "#1A1A1A",
              "#36454F"
            ]
          },
          "url": "https://www.colorsencyclopedia.com/colors/chartreuse/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/colors/chartreuse.json"
        },
        {
          "hex": "#52A300",
          "name": "#52A300",
          "slug": null,
          "rgb": [
            82,
            163,
            0
          ],
          "hsl": [
            90,
            100,
            32
          ],
          "cmyk": [
            50,
            0,
            100,
            36
          ],
          "luminance": 0.2799,
          "contrast": {
            "black": 6.6,
            "white": 3.18
          },
          "wcag": {
            "AA": [
              "#000000",
              "#1A1A1A"
            ],
            "AAA": []
          },
          "url": "https://www.colorsencyclopedia.com/hex/52a300/",
          "apiUrl": "https://www.colorsencyclopedia.com/api/hex/52a300.json"
        }
      ],
      "anchor": "chartreuse-harmony-monochromatic"
    }
  ],
  "signaturePalette": [
    "#7FFF00",
    "#7F00FF",
    "#FFFF00",
    "#00FF00",
    "#ADFF5C",
    "#52A300"
  ],
  "semanticGroups": [
    "green harmony",
    "cool harmony",
    "vibrant harmony",
    "chartreuse palette system"
  ],
  "useCases": [
    "palette generation",
    "brand color exploration",
    "UI accent planning",
    "CSS design tokens",
    "AI color retrieval"
  ],
  "accessibilityNotes": [
    "Black contrast on Chartreuse: 16.21:1",
    "White contrast on Chartreuse: 1.3:1",
    "AA text options: #000000, #1A1A1A, #36454F"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/harmonies/chartreuse.json",
    "https://www.colorsencyclopedia.com/api/colors/chartreuse.json",
    "https://www.colorsencyclopedia.com/api/hex/7fff00.json"
  ],
  "url": "https://www.colorsencyclopedia.com/harmonies/chartreuse/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/harmonies/chartreuse.json",
  "cssSnippet": ":root {\n  --color-chartreuse: #7FFF00;\n  --chartreuse-complementary-1: #7F00FF;\n  --chartreuse-analogous-1: #FFFF00;\n  --chartreuse-analogous-2: #00FF00;\n  --chartreuse-triadic-1: #007FFF;\n  --chartreuse-triadic-2: #FF0080;\n  --chartreuse-tetradic-1: #00FFFF;\n  --chartreuse-tetradic-2: #7F00FF;\n  --chartreuse-tetradic-3: #FF0000;\n  --chartreuse-split-complementary-1: #0000FF;\n  --chartreuse-split-complementary-2: #FF00FF;\n  --chartreuse-monochromatic-1: #ADFF5C;\n  --chartreuse-monochromatic-2: #7FFF00;\n  --chartreuse-monochromatic-3: #52A300;\n}\n\n.palette-chartreuse-harmony {\n  color: #111827;\n  background: linear-gradient(135deg, #7FFF00, #7F00FF, #FFFF00, #00FF00, #ADFF5C, #52A300);\n}"
}

CSS Harmony Tokens

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

:root {
  --color-chartreuse: #7FFF00;
  --chartreuse-complementary-1: #7F00FF;
  --chartreuse-analogous-1: #FFFF00;
  --chartreuse-analogous-2: #00FF00;
  --chartreuse-triadic-1: #007FFF;
  --chartreuse-triadic-2: #FF0080;
  --chartreuse-tetradic-1: #00FFFF;
  --chartreuse-tetradic-2: #7F00FF;
  --chartreuse-tetradic-3: #FF0000;
  --chartreuse-split-complementary-1: #0000FF;
  --chartreuse-split-complementary-2: #FF00FF;
  --chartreuse-monochromatic-1: #ADFF5C;
  --chartreuse-monochromatic-2: #7FFF00;
  --chartreuse-monochromatic-3: #52A300;
}

.palette-chartreuse-harmony {
  color: #111827;
  background: linear-gradient(135deg, #7FFF00, #7F00FF, #FFFF00, #00FF00, #ADFF5C, #52A300);
}

Chartreuse 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 colorChartreuse · #7FFF00

#7F00FF#7F00FF

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 colorChartreuse · #7FFF00

Yellow#FFFF00

Lime#00FF00

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 colorChartreuse · #7FFF00

#007FFF#007FFF

#FF0080#FF0080

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 colorChartreuse · #7FFF00

Cyan#00FFFF

#7F00FF#7F00FF

Red#FF0000

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 colorChartreuse · #7FFF00

Blue#0000FF

Magenta#FF00FF

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 colorChartreuse · #7FFF00

#ADFF5C#ADFF5C

Chartreuse#7FFF00

#52A300#52A300

Chartreuse Color Harmonies

Chartreuse Harmony Guide

Machine-Readable Chartreuse Harmony Data (JSON)

CSS Harmony Tokens

Chartreuse Harmony Groups

Related Harmony Guides