Colors Encyclopedia

Generated palette

Dark Slate Grey Palette

Dark Slate Grey Palette: #2F4F4F, #503030, #305040, #304050. Check roles, contrast and CSS variables; open source-color links and JSON.

Dark Slate Grey Palette assigns primary #2F4F4F, secondary #503030, surface #305040, background #304050, accent #FFFFFF. The set spans Cyan, Red, Green, and Blue families with cool, warm, and neutral temperatures. Luminance runs from #503030 at 0.0403 to #FFFFFF at 1; black gives higher contrast on 1 of 5 values.

All palettesSource colorAPI
5colors
Cyan palettedominant group
7use cases

Palette Color Roles

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

Primary#2F4F4FDark Slate Grey
Secondary#503030#503030
Surface#305040#305040
Background#304050#304050
Accent#FFFFFFWhite

CSS Variables

--palette-dark-slate-grey-primary: #2F4F4F;
--palette-dark-slate-grey-secondary: #503030;
--palette-dark-slate-grey-surface: #305040;
--palette-dark-slate-grey-background: #304050;
--palette-dark-slate-grey-accent: #FFFFFF;

Accessibility Snapshot

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

Primary#2F4F4F
Black 2.35:1 · White 8.93:1
Best #FFFFFF
Secondary#503030
Black 1.81:1 · White 11.63:1
Best #FFFFFF
Surface#305040
Black 2.35:1 · White 8.94:1
Best #FFFFFF
Background#304050
Black 1.97:1 · White 10.64:1
Best #FFFFFF
Accent#FFFFFF
Black 21:1 · White 1:1
Best #000000

UI Components Preview

Preview how the Dark Slate Grey 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 Dark Slate Grey Palette Data (JSON)

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

AI-Ready Dataset v1.0.0
Luminance0.0676
Black text2.35:1AA Fail
White text8.93:1AA 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": "#2F4F4F",
    "name": "Dark Slate Grey"
  },
  {
    "role": "secondary",
    "hex": "#503030",
    "name": "#503030"
  },
  {
    "role": "surface",
    "hex": "#305040",
    "name": "#305040"
  },
  {
    "role": "background",
    "hex": "#304050",
    "name": "#304050"
  },
  {
    "role": "accent",
    "hex": "#FFFFFF",
    "name": "White"
  }
]
Accessibility
[
  {
    "role": "primary",
    "hex": "#2F4F4F",
    "name": "Dark Slate Grey",
    "blackContrast": 2.35,
    "whiteContrast": 8.93,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "secondary",
    "hex": "#503030",
    "name": "#503030",
    "blackContrast": 1.81,
    "whiteContrast": 11.63,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "surface",
    "hex": "#305040",
    "name": "#305040",
    "blackContrast": 2.35,
    "whiteContrast": 8.94,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "background",
    "hex": "#304050",
    "name": "#304050",
    "blackContrast": 1.97,
    "whiteContrast": 10.64,
    "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
[
  "dark slate grey palette",
  "generated palette",
  "cyan palette",
  "red palette",
  "green palette",
  "blue palette",
  "gray palette",
  "muted palette",
  "earth tone palette",
  "light palette",
  "neutral palette",
  "cool palette",
  "warm palette"
]
Use cases
[
  "design system tokens",
  "CSS variables",
  "palette reference",
  "AI color ingestion",
  "quiet UI themes",
  "natural branding",
  "wellness and botanical palettes"
]
CSS variables
"--palette-dark-slate-grey-primary: #2F4F4F;\n--palette-dark-slate-grey-secondary: #503030;\n--palette-dark-slate-grey-surface: #305040;\n--palette-dark-slate-grey-background: #304050;\n--palette-dark-slate-grey-accent: #FFFFFF;"
Full JSON dataset 
{
  "datasetVersion": "1.0.0",
  "slug": "dark-slate-grey",
  "name": "Dark Slate Grey Palette",
  "type": "generated",
  "sourceColor": "dark-slate-grey",
  "description": "Generated palette built from Dark Slate Grey, its harmonies, a high-contrast pairing, and a light variant.",
  "narrative": "Dark Slate Grey Palette combines primary #2F4F4F, secondary #503030, surface #305040, background #304050, accent #FFFFFF. According to Colors Encyclopedia, the palette works as a cyan palette, red palette, green 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": [
    "dark slate grey palette",
    "generated palette",
    "cyan palette",
    "red palette",
    "green palette",
    "blue palette",
    "gray palette",
    "muted palette",
    "earth tone palette",
    "light palette",
    "neutral palette",
    "cool palette",
    "warm palette"
  ],
  "useCases": [
    "design system tokens",
    "CSS variables",
    "palette reference",
    "AI color ingestion",
    "quiet UI themes",
    "natural branding",
    "wellness and botanical palettes"
  ],
  "colors": [
    {
      "role": "primary",
      "hex": "#2F4F4F",
      "slug": "dark-slate-grey",
      "name": "Dark Slate Grey",
      "rgb": [
        47,
        79,
        79
      ],
      "hsl": [
        180,
        25,
        25
      ],
      "cmyk": [
        41,
        0,
        0,
        69
      ],
      "family": "cyan",
      "temperature": "cool",
      "tone": [
        "muted"
      ],
      "luminance": 0.0676,
      "contrast": {
        "black": 2.35,
        "white": 8.93
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": "https://www.colorsencyclopedia.com/colors/dark-slate-grey/"
    },
    {
      "role": "secondary",
      "hex": "#503030",
      "slug": null,
      "name": "#503030",
      "rgb": [
        80,
        48,
        48
      ],
      "hsl": [
        0,
        25,
        25
      ],
      "cmyk": [
        0,
        40,
        40,
        69
      ],
      "family": "red",
      "temperature": "warm",
      "tone": [
        "muted"
      ],
      "luminance": 0.0403,
      "contrast": {
        "black": 1.81,
        "white": 11.63
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": null
    },
    {
      "role": "surface",
      "hex": "#305040",
      "slug": null,
      "name": "#305040",
      "rgb": [
        48,
        80,
        64
      ],
      "hsl": [
        150,
        25,
        25
      ],
      "cmyk": [
        40,
        0,
        20,
        69
      ],
      "family": "green",
      "temperature": "cool",
      "tone": [
        "muted",
        "earth-tone"
      ],
      "luminance": 0.0674,
      "contrast": {
        "black": 2.35,
        "white": 8.94
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": null
    },
    {
      "role": "background",
      "hex": "#304050",
      "slug": null,
      "name": "#304050",
      "rgb": [
        48,
        64,
        80
      ],
      "hsl": [
        210,
        25,
        25
      ],
      "cmyk": [
        40,
        20,
        0,
        69
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "muted"
      ],
      "luminance": 0.0487,
      "contrast": {
        "black": 1.97,
        "white": 10.64
      },
      "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": "#2F4F4F",
      "name": "Dark Slate Grey"
    },
    {
      "role": "secondary",
      "hex": "#503030",
      "name": "#503030"
    },
    {
      "role": "surface",
      "hex": "#305040",
      "name": "#305040"
    },
    {
      "role": "background",
      "hex": "#304050",
      "name": "#304050"
    },
    {
      "role": "accent",
      "hex": "#FFFFFF",
      "name": "White"
    }
  ],
  "accessibility": [
    {
      "role": "primary",
      "hex": "#2F4F4F",
      "name": "Dark Slate Grey",
      "blackContrast": 2.35,
      "whiteContrast": 8.93,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "secondary",
      "hex": "#503030",
      "name": "#503030",
      "blackContrast": 1.81,
      "whiteContrast": 11.63,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "surface",
      "hex": "#305040",
      "name": "#305040",
      "blackContrast": 2.35,
      "whiteContrast": 8.94,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "background",
      "hex": "#304050",
      "name": "#304050",
      "blackContrast": 1.97,
      "whiteContrast": 10.64,
      "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-dark-slate-grey-primary: #2F4F4F;\n--palette-dark-slate-grey-secondary: #503030;\n--palette-dark-slate-grey-surface: #305040;\n--palette-dark-slate-grey-background: #304050;\n--palette-dark-slate-grey-accent: #FFFFFF;",
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/palettes/dark-slate-grey.json",
    "https://www.colorsencyclopedia.com/api/palettes.json",
    "https://www.colorsencyclopedia.com/api/colors/dark-slate-grey.json"
  ],
  "url": "https://www.colorsencyclopedia.com/palettes/dark-slate-grey/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/palettes/dark-slate-grey.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.Dark Slate Grey Palette JSONOpen the machine-readable palette dataset.Dark Slate Grey colorOpen the source color reference for this generated palette.Cyan colorsExplore cyan colors related to this palette.Red colorsExplore red colors related to this palette.Green colorsExplore green colors related to this palette.Blue colorsExplore blue colors related to this palette.Muted colorsExplore muted colors used in palette systems.Earth Tone colorsExplore earth tone colors used in palette systems.Light colorsExplore light colors used in palette systems.Neutral colorsExplore neutral colors used in palette systems.