Colors Encyclopedia

Generated palette

Onyx Palette

Onyx Palette: #353839, #3A3736, #363A39, #36373A. Check roles, contrast and CSS variables; open source-color links and JSON.

Onyx Palette assigns primary #353839, secondary #3A3736, surface #363A39, background #36373A, accent #FFFFFF. The set spans Gray families with neutral temperature. Luminance runs from #36373A at 0.0382 to #FFFFFF at 1; black gives higher contrast on 1 of 5 values.

All palettesSource colorAPI
5colors
Gray palettedominant group
4use cases

Palette Color Roles

Onyx Palette maps 5 colors to practical UI roles for interfaces, brand systems, and CSS tokens.

Primary#353839Onyx
Secondary#3A3736#3A3736
Surface#363A39#363A39
Background#36373A#36373A
Accent#FFFFFFWhite

CSS Variables

--palette-onyx-primary: #353839;
--palette-onyx-secondary: #3A3736;
--palette-onyx-surface: #363A39;
--palette-onyx-background: #36373A;
--palette-onyx-accent: #FFFFFF;

Accessibility Snapshot

Compare all 5 Onyx Palette values against black and white text, with the stronger standard foreground identified for each role.

Primary#353839
Black 1.78:1 · White 11.82:1
Best #FFFFFF
Secondary#3A3736
Black 1.78:1 · White 11.8:1
Best #FFFFFF
Surface#363A39
Black 1.82:1 · White 11.53:1
Best #FFFFFF
Background#36373A
Black 1.76:1 · White 11.9:1
Best #FFFFFF
Accent#FFFFFF
Black 21:1 · White 1:1
Best #000000

UI Components Preview

Preview how the Onyx 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.

Machine-readable data

Machine-Readable Onyx Palette Data (JSON)

Structured palette data for Onyx Palette, including color roles, accessibility, semantic groups, use cases, CSS variables, and API links.

AI-Ready Dataset v1.0.0
Luminance0.0388
Black text1.78:1AA Fail
White text11.82:1AA Pass
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
Download JSON Open API
Structured sections
Roles
[
  {
    "role": "primary",
    "hex": "#353839",
    "name": "Onyx"
  },
  {
    "role": "secondary",
    "hex": "#3A3736",
    "name": "#3A3736"
  },
  {
    "role": "surface",
    "hex": "#363A39",
    "name": "#363A39"
  },
  {
    "role": "background",
    "hex": "#36373A",
    "name": "#36373A"
  },
  {
    "role": "accent",
    "hex": "#FFFFFF",
    "name": "White"
  }
]
Accessibility
[
  {
    "role": "primary",
    "hex": "#353839",
    "name": "Onyx",
    "blackContrast": 1.78,
    "whiteContrast": 11.82,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "secondary",
    "hex": "#3A3736",
    "name": "#3A3736",
    "blackContrast": 1.78,
    "whiteContrast": 11.8,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "surface",
    "hex": "#363A39",
    "name": "#363A39",
    "blackContrast": 1.82,
    "whiteContrast": 11.53,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "background",
    "hex": "#36373A",
    "name": "#36373A",
    "blackContrast": 1.76,
    "whiteContrast": 11.9,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "accent",
    "hex": "#FFFFFF",
    "name": "White",
    "blackContrast": 21,
    "whiteContrast": 1,
    "bestTextColor": "#000000",
    "aaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ],
    "aaaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ]
  }
]
Semantic groups
[
  "onyx palette",
  "generated palette",
  "gray palette",
  "dark palette",
  "light palette",
  "neutral palette"
]
Use cases
[
  "design system tokens",
  "CSS variables",
  "palette reference",
  "AI color ingestion"
]
CSS variables
"--palette-onyx-primary: #353839;\n--palette-onyx-secondary: #3A3736;\n--palette-onyx-surface: #363A39;\n--palette-onyx-background: #36373A;\n--palette-onyx-accent: #FFFFFF;"
Full JSON dataset 
{
  "datasetVersion": "1.0.0",
  "slug": "onyx",
  "name": "Onyx Palette",
  "type": "generated",
  "sourceColor": "onyx",
  "description": "Generated palette built from Onyx, its harmonies, a high-contrast pairing, and a light variant.",
  "narrative": "Onyx Palette combines primary #353839, secondary #3A3736, surface #363A39, background #36373A, accent #FFFFFF. According to Colors Encyclopedia, the palette works as a gray palette, dark palette, light 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": [
    "onyx palette",
    "generated palette",
    "gray palette",
    "dark palette",
    "light palette",
    "neutral palette"
  ],
  "useCases": [
    "design system tokens",
    "CSS variables",
    "palette reference",
    "AI color ingestion"
  ],
  "colors": [
    {
      "role": "primary",
      "hex": "#353839",
      "slug": "onyx",
      "name": "Onyx",
      "rgb": [
        53,
        56,
        57
      ],
      "hsl": [
        195,
        4,
        22
      ],
      "cmyk": [
        7,
        2,
        0,
        78
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "dark"
      ],
      "luminance": 0.0388,
      "contrast": {
        "black": 1.78,
        "white": 11.82
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": "https://www.colorsencyclopedia.com/colors/onyx/"
    },
    {
      "role": "secondary",
      "hex": "#3A3736",
      "slug": null,
      "name": "#3A3736",
      "rgb": [
        58,
        55,
        54
      ],
      "hsl": [
        15,
        4,
        22
      ],
      "cmyk": [
        0,
        5,
        7,
        77
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "dark"
      ],
      "luminance": 0.039,
      "contrast": {
        "black": 1.78,
        "white": 11.8
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": null
    },
    {
      "role": "surface",
      "hex": "#363A39",
      "slug": null,
      "name": "#363A39",
      "rgb": [
        54,
        58,
        57
      ],
      "hsl": [
        165,
        4,
        22
      ],
      "cmyk": [
        7,
        0,
        2,
        77
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "dark"
      ],
      "luminance": 0.0411,
      "contrast": {
        "black": 1.82,
        "white": 11.53
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": null
    },
    {
      "role": "background",
      "hex": "#36373A",
      "slug": null,
      "name": "#36373A",
      "rgb": [
        54,
        55,
        58
      ],
      "hsl": [
        225,
        4,
        22
      ],
      "cmyk": [
        7,
        5,
        0,
        77
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "dark"
      ],
      "luminance": 0.0382,
      "contrast": {
        "black": 1.76,
        "white": 11.9
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": null
    },
    {
      "role": "accent",
      "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": "#353839",
      "name": "Onyx"
    },
    {
      "role": "secondary",
      "hex": "#3A3736",
      "name": "#3A3736"
    },
    {
      "role": "surface",
      "hex": "#363A39",
      "name": "#363A39"
    },
    {
      "role": "background",
      "hex": "#36373A",
      "name": "#36373A"
    },
    {
      "role": "accent",
      "hex": "#FFFFFF",
      "name": "White"
    }
  ],
  "accessibility": [
    {
      "role": "primary",
      "hex": "#353839",
      "name": "Onyx",
      "blackContrast": 1.78,
      "whiteContrast": 11.82,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "secondary",
      "hex": "#3A3736",
      "name": "#3A3736",
      "blackContrast": 1.78,
      "whiteContrast": 11.8,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "surface",
      "hex": "#363A39",
      "name": "#363A39",
      "blackContrast": 1.82,
      "whiteContrast": 11.53,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "background",
      "hex": "#36373A",
      "name": "#36373A",
      "blackContrast": 1.76,
      "whiteContrast": 11.9,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "accent",
      "hex": "#FFFFFF",
      "name": "White",
      "blackContrast": 21,
      "whiteContrast": 1,
      "bestTextColor": "#000000",
      "aaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "aaaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ]
    }
  ],
  "cssVariables": "--palette-onyx-primary: #353839;\n--palette-onyx-secondary: #3A3736;\n--palette-onyx-surface: #363A39;\n--palette-onyx-background: #36373A;\n--palette-onyx-accent: #FFFFFF;",
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/palettes/onyx.json",
    "https://www.colorsencyclopedia.com/api/palettes.json",
    "https://www.colorsencyclopedia.com/api/colors/onyx.json"
  ],
  "url": "https://www.colorsencyclopedia.com/palettes/onyx/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/palettes/onyx.json"
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Related Palette Guides

All color palettesBrowse curated and generated palette references.Onyx Palette JSONOpen the machine-readable palette dataset.Onyx colorOpen the source color reference for this generated palette.Gray colorsExplore gray colors related to this palette.Dark colorsExplore dark colors used in palette systems.Light colorsExplore light colors used in palette systems.Neutral colorsExplore neutral colors used in palette systems.