Colors Encyclopedia

Generated palette

Mustard Yellow Palette

Mustard Yellow Palette: #E1AD01, #0135DF, #DF3C01, #A4DF01. Check roles, contrast and CSS variables; open source-color links and JSON.

Mustard Yellow Palette assigns primary #E1AD01, secondary #0135DF, surface #DF3C01, background #A4DF01, accent #000000. The set spans Yellow, Blue, Orange, and Green families with warm, cool, and neutral temperatures. Luminance runs from #000000 at 0 to #A4DF01 at 0.6067; black gives higher contrast on 3 of 5 values.

All palettesSource colorAPI
5colors
Yellow palettedominant group
6use cases

Palette Color Roles

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

Primary#E1AD01Mustard Yellow
Secondary#0135DF#0135DF
Surface#DF3C01#DF3C01
Background#A4DF01#A4DF01
Accent#000000Black

CSS Variables

--palette-mustard-yellow-primary: #E1AD01;
--palette-mustard-yellow-secondary: #0135DF;
--palette-mustard-yellow-surface: #DF3C01;
--palette-mustard-yellow-background: #A4DF01;
--palette-mustard-yellow-accent: #000000;

Accessibility Snapshot

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

Primary#E1AD01
Black 10.18:1 · White 2.06:1
Best #000000
Secondary#0135DF
Black 2.58:1 · White 8.15:1
Best #FFFFFF
Surface#DF3C01
Black 4.78:1 · White 4.39:1
Best #000000
Background#A4DF01
Black 13.13:1 · White 1.6:1
Best #000000
Accent#000000
Black 1:1 · White 21:1
Best #FFFFFF

UI Components Preview

Preview how the Mustard Yellow 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 Mustard Yellow Palette Data (JSON)

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

AI-Ready Dataset v1.0.0
Luminance0.459
Black text10.18:1AA Pass
White text2.06:1AA 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": "#E1AD01",
    "name": "Mustard Yellow"
  },
  {
    "role": "secondary",
    "hex": "#0135DF",
    "name": "#0135DF"
  },
  {
    "role": "surface",
    "hex": "#DF3C01",
    "name": "#DF3C01"
  },
  {
    "role": "background",
    "hex": "#A4DF01",
    "name": "#A4DF01"
  },
  {
    "role": "accent",
    "hex": "#000000",
    "name": "Black"
  }
]
Accessibility
[
  {
    "role": "primary",
    "hex": "#E1AD01",
    "name": "Mustard Yellow",
    "blackContrast": 10.18,
    "whiteContrast": 2.06,
    "bestTextColor": "#000000",
    "aaTextOptions": [
      "#000000",
      "#1A1A1A",
      "#36454F"
    ],
    "aaaTextOptions": [
      "#000000",
      "#1A1A1A"
    ]
  },
  {
    "role": "secondary",
    "hex": "#0135DF",
    "name": "#0135DF",
    "blackContrast": 2.58,
    "whiteContrast": 8.15,
    "bestTextColor": "#FFFFFF",
    "aaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "aaaTextOptions": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  {
    "role": "surface",
    "hex": "#DF3C01",
    "name": "#DF3C01",
    "blackContrast": 4.78,
    "whiteContrast": 4.39,
    "bestTextColor": "#000000",
    "aaTextOptions": [
      "#000000"
    ],
    "aaaTextOptions": []
  },
  {
    "role": "background",
    "hex": "#A4DF01",
    "name": "#A4DF01",
    "blackContrast": 13.13,
    "whiteContrast": 1.6,
    "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
[
  "mustard yellow palette",
  "generated palette",
  "yellow palette",
  "blue palette",
  "orange palette",
  "green palette",
  "gray palette",
  "vibrant palette",
  "jewel tone palette",
  "dark palette",
  "neutral palette",
  "warm palette",
  "cool palette"
]
Use cases
[
  "design system tokens",
  "CSS variables",
  "palette reference",
  "AI color ingestion",
  "wellness and botanical palettes",
  "calm digital interfaces"
]
CSS variables
"--palette-mustard-yellow-primary: #E1AD01;\n--palette-mustard-yellow-secondary: #0135DF;\n--palette-mustard-yellow-surface: #DF3C01;\n--palette-mustard-yellow-background: #A4DF01;\n--palette-mustard-yellow-accent: #000000;"
Full JSON dataset 
{
  "datasetVersion": "1.0.0",
  "slug": "mustard-yellow",
  "name": "Mustard Yellow Palette",
  "type": "generated",
  "sourceColor": "mustard-yellow",
  "description": "Generated palette built from Mustard Yellow, its harmonies, a high-contrast pairing, and a light variant.",
  "narrative": "Mustard Yellow Palette combines primary #E1AD01, secondary #0135DF, surface #DF3C01, background #A4DF01, accent #000000. According to Colors Encyclopedia, the palette works as a yellow palette, blue palette, orange 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": [
    "mustard yellow palette",
    "generated palette",
    "yellow palette",
    "blue palette",
    "orange palette",
    "green palette",
    "gray palette",
    "vibrant palette",
    "jewel tone palette",
    "dark palette",
    "neutral palette",
    "warm palette",
    "cool palette"
  ],
  "useCases": [
    "design system tokens",
    "CSS variables",
    "palette reference",
    "AI color ingestion",
    "wellness and botanical palettes",
    "calm digital interfaces"
  ],
  "colors": [
    {
      "role": "primary",
      "hex": "#E1AD01",
      "slug": "mustard-yellow",
      "name": "Mustard Yellow",
      "rgb": [
        225,
        173,
        1
      ],
      "hsl": [
        46,
        99,
        44
      ],
      "cmyk": [
        0,
        23,
        100,
        12
      ],
      "family": "yellow",
      "temperature": "warm",
      "tone": [
        "vibrant"
      ],
      "luminance": 0.459,
      "contrast": {
        "black": 10.18,
        "white": 2.06
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ],
        "AAA": [
          "#000000",
          "#1A1A1A"
        ]
      },
      "url": "https://www.colorsencyclopedia.com/colors/mustard-yellow/"
    },
    {
      "role": "secondary",
      "hex": "#0135DF",
      "slug": null,
      "name": "#0135DF",
      "rgb": [
        1,
        53,
        223
      ],
      "hsl": [
        226,
        99,
        44
      ],
      "cmyk": [
        100,
        76,
        0,
        13
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "vibrant",
        "jewel-tone"
      ],
      "luminance": 0.0788,
      "contrast": {
        "black": 2.58,
        "white": 8.15
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "url": null
    },
    {
      "role": "surface",
      "hex": "#DF3C01",
      "slug": null,
      "name": "#DF3C01",
      "rgb": [
        223,
        60,
        1
      ],
      "hsl": [
        16,
        99,
        44
      ],
      "cmyk": [
        0,
        73,
        100,
        13
      ],
      "family": "orange",
      "temperature": "warm",
      "tone": [
        "vibrant"
      ],
      "luminance": 0.1892,
      "contrast": {
        "black": 4.78,
        "white": 4.39
      },
      "wcag": {
        "AA": [
          "#000000"
        ],
        "AAA": []
      },
      "url": null
    },
    {
      "role": "background",
      "hex": "#A4DF01",
      "slug": null,
      "name": "#A4DF01",
      "rgb": [
        164,
        223,
        1
      ],
      "hsl": [
        76,
        99,
        44
      ],
      "cmyk": [
        26,
        0,
        100,
        13
      ],
      "family": "green",
      "temperature": "cool",
      "tone": [
        "vibrant",
        "jewel-tone"
      ],
      "luminance": 0.6067,
      "contrast": {
        "black": 13.13,
        "white": 1.6
      },
      "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": "#E1AD01",
      "name": "Mustard Yellow"
    },
    {
      "role": "secondary",
      "hex": "#0135DF",
      "name": "#0135DF"
    },
    {
      "role": "surface",
      "hex": "#DF3C01",
      "name": "#DF3C01"
    },
    {
      "role": "background",
      "hex": "#A4DF01",
      "name": "#A4DF01"
    },
    {
      "role": "accent",
      "hex": "#000000",
      "name": "Black"
    }
  ],
  "accessibility": [
    {
      "role": "primary",
      "hex": "#E1AD01",
      "name": "Mustard Yellow",
      "blackContrast": 10.18,
      "whiteContrast": 2.06,
      "bestTextColor": "#000000",
      "aaTextOptions": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "aaaTextOptions": [
        "#000000",
        "#1A1A1A"
      ]
    },
    {
      "role": "secondary",
      "hex": "#0135DF",
      "name": "#0135DF",
      "blackContrast": 2.58,
      "whiteContrast": 8.15,
      "bestTextColor": "#FFFFFF",
      "aaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "aaaTextOptions": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    {
      "role": "surface",
      "hex": "#DF3C01",
      "name": "#DF3C01",
      "blackContrast": 4.78,
      "whiteContrast": 4.39,
      "bestTextColor": "#000000",
      "aaTextOptions": [
        "#000000"
      ],
      "aaaTextOptions": []
    },
    {
      "role": "background",
      "hex": "#A4DF01",
      "name": "#A4DF01",
      "blackContrast": 13.13,
      "whiteContrast": 1.6,
      "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-mustard-yellow-primary: #E1AD01;\n--palette-mustard-yellow-secondary: #0135DF;\n--palette-mustard-yellow-surface: #DF3C01;\n--palette-mustard-yellow-background: #A4DF01;\n--palette-mustard-yellow-accent: #000000;",
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/palettes/mustard-yellow.json",
    "https://www.colorsencyclopedia.com/api/palettes.json",
    "https://www.colorsencyclopedia.com/api/colors/mustard-yellow.json"
  ],
  "url": "https://www.colorsencyclopedia.com/palettes/mustard-yellow/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/palettes/mustard-yellow.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.Mustard Yellow Palette JSONOpen the machine-readable palette dataset.Mustard Yellow colorOpen the source color reference for this generated palette.Yellow colorsExplore yellow colors related to this palette.Blue colorsExplore blue colors related to this palette.Orange colorsExplore orange colors related to this palette.Green colorsExplore green colors related to this palette.Vibrant colorsExplore vibrant colors used in palette systems.Jewel Tone colorsExplore jewel tone colors used in palette systems.Dark colorsExplore dark colors used in palette systems.Neutral colorsExplore neutral colors used in palette systems.