Colors Encyclopedia

Generated palette

Copper Palette

Copper Palette: #B87333, #3278B8, #B83235, #B8B632. Check roles, contrast and CSS variables; open source-color links and JSON.

Copper Palette assigns primary #B87333, secondary #3278B8, surface #B83235, background #B8B632, accent #000000. The set spans Orange, Blue, Red, and Yellow families with warm, cool, and neutral temperatures. Luminance runs from #000000 at 0 to #B8B632 at 0.4388; black gives higher contrast on 2 of 5 values.

All palettesSource colorAPI
5colors
Orange palettedominant group
6use cases

Palette Color Roles

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

Primary#B87333Polished Copper
Secondary#3278B8#3278B8
Surface#B83235#B83235
Background#B8B632#B8B632
Accent#000000Black

CSS Variables

--palette-copper-primary: #B87333;
--palette-copper-secondary: #3278B8;
--palette-copper-surface: #B83235;
--palette-copper-background: #B8B632;
--palette-copper-accent: #000000;

Accessibility Snapshot

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

Primary#B87333
Black 5.54:1 · White 3.79:1
Best #000000
Secondary#3278B8
Black 4.51:1 · White 4.65:1
Best #FFFFFF
Surface#B83235
Black 3.55:1 · White 5.92:1
Best #FFFFFF
Background#B8B632
Black 9.78:1 · White 2.15:1
Best #000000
Accent#000000
Black 1:1 · White 21:1
Best #FFFFFF

UI Components Preview

Preview how the Copper 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 Copper Palette Data (JSON)

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

AI-Ready Dataset v1.0.0
Luminance0.2269
Black text5.54:1AA Pass
White text3.79:1AA 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
Download JSON Open API
Structured sections
Roles
[
  {
    "role": "primary",
    "hex": "#B87333",
    "name": "Polished Copper"
  },
  {
    "role": "secondary",
    "hex": "#3278B8",
    "name": "#3278B8"
  },
  {
    "role": "surface",
    "hex": "#B83235",
    "name": "#B83235"
  },
  {
    "role": "background",
    "hex": "#B8B632",
    "name": "#B8B632"
  },
  {
    "role": "accent",
    "hex": "#000000",
    "name": "Black"
  }
]
Accessibility
[
  {
    "role": "primary",
    "hex": "#B87333",
    "name": "Polished Copper",
    "blackContrast": 5.54,
    "whiteContrast": 3.79,
    "bestTextColor": "#000000",
    "aaTextOptions": [
      "#000000",
      "#1A1A1A"
    ],
    "aaaTextOptions": []
  },
  {
    "role": "secondary",
    "hex": "#3278B8",
    "name": "#3278B8",
    "blackContrast": 4.51,
    "whiteContrast": 4.65,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#000000",
      "#FFFFFF"
    ],
    "aaaTextOptions": []
  },
  {
    "role": "surface",
    "hex": "#B83235",
    "name": "#B83235",
    "blackContrast": 3.55,
    "whiteContrast": 5.92,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": []
  },
  {
    "role": "background",
    "hex": "#B8B632",
    "name": "#B8B632",
    "blackContrast": 9.78,
    "whiteContrast": 2.15,
    "bestTextColor": "#000000",
    "aaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ],
    "aaaTextOptions": [
      "#000000",
      "#1A1A1A"
    ]
  },
  {
    "role": "accent",
    "hex": "#000000",
    "name": "Black",
    "blackContrast": 1,
    "whiteContrast": 21,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  }
]
Semantic groups
[
  "copper palette",
  "generated palette",
  "orange palette",
  "blue palette",
  "red palette",
  "yellow palette",
  "gray palette",
  "earth tone palette",
  "balanced palette",
  "dark palette",
  "neutral palette",
  "warm palette",
  "cool palette"
]
Use cases
[
  "design system tokens",
  "CSS variables",
  "palette reference",
  "AI color ingestion",
  "natural branding",
  "calm digital interfaces"
]
CSS variables
"--palette-copper-primary: #B87333;\n--palette-copper-secondary: #3278B8;\n--palette-copper-surface: #B83235;\n--palette-copper-background: #B8B632;\n--palette-copper-accent: #000000;"
Full JSON dataset 
{
  "datasetVersion": "1.0.0",
  "slug": "copper",
  "name": "Copper Palette",
  "type": "generated",
  "sourceColor": "copper",
  "description": "Generated palette built from Copper, its harmonies, a high-contrast pairing, and a light variant.",
  "narrative": "Copper Palette combines primary #B87333, secondary #3278B8, surface #B83235, background #B8B632, accent #000000. According to Colors Encyclopedia, the palette works as a orange palette, blue palette, red 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": [
    "copper palette",
    "generated palette",
    "orange palette",
    "blue palette",
    "red palette",
    "yellow palette",
    "gray palette",
    "earth tone palette",
    "balanced palette",
    "dark palette",
    "neutral palette",
    "warm palette",
    "cool palette"
  ],
  "useCases": [
    "design system tokens",
    "CSS variables",
    "palette reference",
    "AI color ingestion",
    "natural branding",
    "calm digital interfaces"
  ],
  "colors": [
    {
      "role": "primary",
      "hex": "#B87333",
      "slug": "polished-copper",
      "name": "Polished Copper",
      "rgb": [
        184,
        115,
        51
      ],
      "hsl": [
        29,
        57,
        46
      ],
      "cmyk": [
        0,
        38,
        72,
        28
      ],
      "family": "orange",
      "temperature": "warm",
      "tone": [
        "earth-tone"
      ],
      "luminance": 0.2269,
      "contrast": {
        "black": 5.54,
        "white": 3.79
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A"
        ],
        "AAA": []
      },
      "url": "https://www.colorsencyclopedia.com/colors/polished-copper/"
    },
    {
      "role": "secondary",
      "hex": "#3278B8",
      "slug": null,
      "name": "#3278B8",
      "rgb": [
        50,
        120,
        184
      ],
      "hsl": [
        209,
        57,
        46
      ],
      "cmyk": [
        73,
        35,
        0,
        28
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "balanced"
      ],
      "luminance": 0.1757,
      "contrast": {
        "black": 4.51,
        "white": 4.65
      },
      "wcag": {
        "AA": [
          "#000000",
          "#FFFFFF"
        ],
        "AAA": []
      },
      "url": null
    },
    {
      "role": "surface",
      "hex": "#B83235",
      "slug": null,
      "name": "#B83235",
      "rgb": [
        184,
        50,
        53
      ],
      "hsl": [
        359,
        57,
        46
      ],
      "cmyk": [
        0,
        73,
        71,
        28
      ],
      "family": "red",
      "temperature": "warm",
      "tone": [
        "balanced"
      ],
      "luminance": 0.1273,
      "contrast": {
        "black": 3.55,
        "white": 5.92
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": []
      },
      "url": null
    },
    {
      "role": "background",
      "hex": "#B8B632",
      "slug": null,
      "name": "#B8B632",
      "rgb": [
        184,
        182,
        50
      ],
      "hsl": [
        59,
        57,
        46
      ],
      "cmyk": [
        0,
        1,
        73,
        28
      ],
      "family": "yellow",
      "temperature": "warm",
      "tone": [
        "earth-tone"
      ],
      "luminance": 0.4388,
      "contrast": {
        "black": 9.78,
        "white": 2.15
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ],
        "AAA": [
          "#000000",
          "#1A1A1A"
        ]
      },
      "url": null
    },
    {
      "role": "accent",
      "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/"
    }
  ],
  "roles": [
    {
      "role": "primary",
      "hex": "#B87333",
      "name": "Polished Copper"
    },
    {
      "role": "secondary",
      "hex": "#3278B8",
      "name": "#3278B8"
    },
    {
      "role": "surface",
      "hex": "#B83235",
      "name": "#B83235"
    },
    {
      "role": "background",
      "hex": "#B8B632",
      "name": "#B8B632"
    },
    {
      "role": "accent",
      "hex": "#000000",
      "name": "Black"
    }
  ],
  "accessibility": [
    {
      "role": "primary",
      "hex": "#B87333",
      "name": "Polished Copper",
      "blackContrast": 5.54,
      "whiteContrast": 3.79,
      "bestTextColor": "#000000",
      "aaTextOptions": [
        "#000000",
        "#1A1A1A"
      ],
      "aaaTextOptions": []
    },
    {
      "role": "secondary",
      "hex": "#3278B8",
      "name": "#3278B8",
      "blackContrast": 4.51,
      "whiteContrast": 4.65,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#000000",
        "#FFFFFF"
      ],
      "aaaTextOptions": []
    },
    {
      "role": "surface",
      "hex": "#B83235",
      "name": "#B83235",
      "blackContrast": 3.55,
      "whiteContrast": 5.92,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": []
    },
    {
      "role": "background",
      "hex": "#B8B632",
      "name": "#B8B632",
      "blackContrast": 9.78,
      "whiteContrast": 2.15,
      "bestTextColor": "#000000",
      "aaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "aaaTextOptions": [
        "#000000",
        "#1A1A1A"
      ]
    },
    {
      "role": "accent",
      "hex": "#000000",
      "name": "Black",
      "blackContrast": 1,
      "whiteContrast": 21,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    }
  ],
  "cssVariables": "--palette-copper-primary: #B87333;\n--palette-copper-secondary: #3278B8;\n--palette-copper-surface: #B83235;\n--palette-copper-background: #B8B632;\n--palette-copper-accent: #000000;",
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/palettes/copper.json",
    "https://www.colorsencyclopedia.com/api/palettes.json",
    "https://www.colorsencyclopedia.com/api/colors/copper.json"
  ],
  "url": "https://www.colorsencyclopedia.com/palettes/copper/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/palettes/copper.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.Copper Palette JSONOpen the machine-readable palette dataset.Copper colorOpen the source color reference for this generated palette.Orange colorsExplore orange colors related to this palette.Blue colorsExplore blue colors related to this palette.Red colorsExplore red colors related to this palette.Yellow colorsExplore yellow colors related to this palette.Earth Tone colorsExplore earth tone colors used in palette systems.Balanced colorsExplore balanced colors used in palette systems.Dark colorsExplore dark colors used in palette systems.Neutral colorsExplore neutral colors used in palette systems.