Generated palette

Mercury Palette

Mercury Palette: #EBEBEB, #000000, #FFFFFF. Check roles, contrast and CSS variables; open source-color links and JSON.

Mercury Palette assigns primary #EBEBEB, secondary #000000, surface #FFFFFF. The set spans Gray families with neutral temperature. Luminance runs from #000000 at 0 to #FFFFFF at 1; black gives higher contrast on 2 of 3 values.

All palettes Source color API

3colors

Gray palettedominant group

4use cases

Palette Color Roles

Mercury Palette maps 3 colors to practical UI roles for interfaces, brand systems, and CSS tokens.

Primary#EBEBEBMercury

Secondary#000000Black

Surface#FFFFFFWhite

CSS Variables

--palette-mercury-primary: #EBEBEB;
--palette-mercury-secondary: #000000;
--palette-mercury-surface: #FFFFFF;

Accessibility Snapshot

Compare all 3 Mercury Palette values against black and white text, with the stronger standard foreground identified for each role.

Primary#EBEBEB
Black 17.62:1 · White 1.19:1
Best #000000

Secondary#000000
Black 1:1 · White 21:1
Best #FFFFFF

Surface#FFFFFF
Black 21:1 · White 1:1
Best #000000

UI Components Preview

Preview how the Mercury Palette roles behave together across common interface components before copying the CSS variables.

ButtonPrimary action with checked foreground contrast.

CardSurface treatment using palette roles.

AlertBackground, text, and accent roles together.

NavbarSecondary role with accent state.

Luminance0.8308

Black text17.62:1AA Pass

White text1.19:1AA Fail

colorsPalette colors with roles and color systems

rolesPrimary, secondary, surface, background, and accent mapping

accessibilityContrast and WCAG text options by palette color

semanticGroupsAI-readable palette labels

useCasesDesign and implementation contexts

cssVariablesCopy-ready CSS custom properties

Structured sections

Roles

[
  {
    "role": "primary",
    "hex": "#EBEBEB",
    "name": "Mercury"
  },
  {
    "role": "secondary",
    "hex": "#000000",
    "name": "Black"
  },
  {
    "role": "surface",
    "hex": "#FFFFFF",
    "name": "White"
  }
]

Accessibility

[
  {
    "role": "primary",
    "hex": "#EBEBEB",
    "name": "Mercury",
    "blackContrast": 17.62,
    "whiteContrast": 1.19,
    "bestTextColor": "#000000",
    "aaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ],
    "aaaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ]
  },
  {
    "role": "secondary",
    "hex": "#000000",
    "name": "Black",
    "blackContrast": 1,
    "whiteContrast": 21,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "surface",
    "hex": "#FFFFFF",
    "name": "White",
    "blackContrast": 21,
    "whiteContrast": 1,
    "bestTextColor": "#000000",
    "aaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ],
    "aaaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ]
  }
]

Semantic groups

[
  "mercury palette",
  "generated palette",
  "gray palette",
  "light palette",
  "dark palette",
  "neutral palette"
]

Use cases

[
  "design system tokens",
  "CSS variables",
  "palette reference",
  "AI color ingestion"
]

CSS variables

"--palette-mercury-primary: #EBEBEB;\n--palette-mercury-secondary: #000000;\n--palette-mercury-surface: #FFFFFF;"

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "mercury",
  "name": "Mercury Palette",
  "type": "generated",
  "sourceColor": "mercury",
  "description": "Generated palette built from Mercury, its harmonies, a high-contrast pairing, and a light variant.",
  "narrative": "Mercury Palette combines primary #EBEBEB, secondary #000000, surface #FFFFFF. According to Colors Encyclopedia, the palette works as a gray palette, light palette, dark palette system for design system tokens, CSS variables, palette reference, and AI color ingestion, with each color mapped to roles, contrast data, CSS tokens, and machine-readable JSON.",
  "semanticGroups": [
    "mercury palette",
    "generated palette",
    "gray palette",
    "light palette",
    "dark palette",
    "neutral palette"
  ],
  "useCases": [
    "design system tokens",
    "CSS variables",
    "palette reference",
    "AI color ingestion"
  ],
  "colors": [
    {
      "role": "primary",
      "hex": "#EBEBEB",
      "slug": "mercury",
      "name": "Mercury",
      "rgb": [
        235,
        235,
        235
      ],
      "hsl": [
        0,
        0,
        92
      ],
      "cmyk": [
        0,
        0,
        0,
        8
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "light"
      ],
      "luminance": 0.8308,
      "contrast": {
        "black": 17.62,
        "white": 1.19
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ],
        "AAA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ]
      },
      "url": "https://www.colorsencyclopedia.com/colors/mercury/"
    },
    {
      "role": "secondary",
      "hex": "#000000",
      "slug": "black",
      "name": "Black",
      "rgb": [
        0,
        0,
        0
      ],
      "hsl": [
        0,
        0,
        0
      ],
      "cmyk": [
        0,
        0,
        0,
        100
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "dark",
        "neutral"
      ],
      "luminance": 0,
      "contrast": {
        "black": 1,
        "white": 21
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": "https://www.colorsencyclopedia.com/colors/black/"
    },
    {
      "role": "surface",
      "hex": "#FFFFFF",
      "slug": "white",
      "name": "White",
      "rgb": [
        255,
        255,
        255
      ],
      "hsl": [
        0,
        0,
        100
      ],
      "cmyk": [
        0,
        0,
        0,
        0
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "light",
        "neutral"
      ],
      "luminance": 1,
      "contrast": {
        "black": 21,
        "white": 1
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ],
        "AAA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ]
      },
      "url": "https://www.colorsencyclopedia.com/colors/white/"
    }
  ],
  "roles": [
    {
      "role": "primary",
      "hex": "#EBEBEB",
      "name": "Mercury"
    },
    {
      "role": "secondary",
      "hex": "#000000",
      "name": "Black"
    },
    {
      "role": "surface",
      "hex": "#FFFFFF",
      "name": "White"
    }
  ],
  "accessibility": [
    {
      "role": "primary",
      "hex": "#EBEBEB",
      "name": "Mercury",
      "blackContrast": 17.62,
      "whiteContrast": 1.19,
      "bestTextColor": "#000000",
      "aaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "aaaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ]
    },
    {
      "role": "secondary",
      "hex": "#000000",
      "name": "Black",
      "blackContrast": 1,
      "whiteContrast": 21,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "surface",
      "hex": "#FFFFFF",
      "name": "White",
      "blackContrast": 21,
      "whiteContrast": 1,
      "bestTextColor": "#000000",
      "aaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "aaaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ]
    }
  ],
  "cssVariables": "--palette-mercury-primary: #EBEBEB;\n--palette-mercury-secondary: #000000;\n--palette-mercury-surface: #FFFFFF;",
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/palettes/mercury.json",
    "https://www.colorsencyclopedia.com/api/palettes.json",
    "https://www.colorsencyclopedia.com/api/colors/mercury.json"
  ],
  "url": "https://www.colorsencyclopedia.com/palettes/mercury/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/palettes/mercury.json"
}

Mercury Palette

Palette Color Roles

CSS Variables

Accessibility Snapshot

UI Components Preview

Machine-Readable Mercury Palette Data (JSON)

Related Palette Guides