Colors Encyclopedia

Brand colors

Slack Brand Colors

Slack palette: #4A154B, #36C5F0, #2EB67D, #ECB22E. Compare HEX/RGB, WCAG contrast and CSS tokens; open independent JSON data.

Commonly referenced brand color values. This page is an independent technical reference and is not affiliated with or endorsed by Slack.

TechnologyBrand indexAPIDataset
Commonly referenced palette Slack
#4A154B#36C5F0#2EB67D#ECB22E#E01E5A
Listed without an implied color hierarchy

Palette

Palette color 1#4A154BRGB 74, 21, 75
Palette color 2#36C5F0RGB 54, 197, 240
Palette color 3#2EB67DRGB 46, 182, 125
Palette color 4#ECB22ERGB 236, 178, 46
Palette color 5#E01E5ARGB 224, 30, 90

CSS Tokens

:root {
  --brand-slack-1: #4A154B;
  --brand-slack-2: #36C5F0;
  --brand-slack-3: #2EB67D;
  --brand-slack-4: #ECB22E;
  --brand-slack-5: #E01E5A;
}

Accessibility Snapshot

#4A154BBlack 1.5:1 / White 14:1
#36C5F0Black 10.4:1 / White 2.02:1
#2EB67DBlack 8.1:1 / White 2.59:1
#ECB22EBlack 10.97:1 / White 1.91:1
#E01E5ABlack 4.5:1 / White 4.66:1

Brand palette context · Editorially reviewed

About Slack Brand Colors

Slack’s palette combines a dark aubergine base with cyan, green, yellow, and red accents. The multicolor construction makes the system recognizable through relationships rather than one isolated swatch. Slack’s official media kit directs users to a dedicated brand center covering color, typography, illustration, writing, and logo rules together.

In interface work, the dark tone can carry typography and structure while the brighter colors distinguish emphasis or categories. Repeating all accents at equal strength can quickly become noisy, so spacing and hierarchy are as important as the HEX values. Slack also treats its name and logo as protected marks whose use must remain within its published guidelines.

This is an independent color reference, not a Slack brand kit, legal permission, partnership, or endorsement.

Downloadable brand colors infographic

Slack Brand Colors Infographic

Save an independent infographic of the commonly referenced Slack HEX palette and its accessibility guidance. No logo or proprietary artwork is included.

1200 × 800
Slack brand colors infographic showing its commonly referenced HEX palette and accessibility guidance for every listed color without assigning a color hierarchy.
Slack brand colors infographic. Commonly referenced brand color values. This page is an independent technical reference and is not affiliated with or endorsed by Slack.
Download WebPDownload SVGOpen full size

Machine-readable data

Machine-Readable Brand Color Data (JSON)

Structured brand palette data for design systems, references, automations, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.025
Black text1.5:1AA Fail
White text14:1AA Pass
hexCanonical HEX value
rgbRed, green, blue channels
hslHue, saturation, lightness
cmykApproximate print conversion
wcagAA and AAA contrast options
harmoniesMathematical harmony sets
variantsGenerated tone variants
nearestColorsKnowledge graph neighbors
Download JSON Open API
Structured sections
Brand
{
  "slug": "slack",
  "name": "Slack",
  "category": "technology",
  "brandCategory": [
    "Technology",
    "technology"
  ],
  "url": "https://www.colorsencyclopedia.com/brand-colors/slack/",
  "categoryUrl": "https://www.colorsencyclopedia.com/brand-colors/technology/",
  "disclaimer": "Commonly referenced brand color values. This page is an independent technical reference and is not affiliated with or endorsed by Slack."
}
Palette
[
  {
    "name": "Palette color 1",
    "hex": "#4A154B",
    "rgb": [
      74,
      21,
      75
    ],
    "hsl": [
      299,
      56,
      19
    ],
    "cmyk": [
      1,
      72,
      0,
      71
    ],
    "luminance": 0.025,
    "contrast": {
      "black": 1.5,
      "white": 14
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    }
  },
  {
    "name": "Palette color 2",
    "hex": "#36C5F0",
    "rgb": [
      54,
      197,
      240
    ],
    "hsl": [
      194,
      86,
      58
    ],
    "cmyk": [
      78,
      18,
      0,
      6
    ],
    "luminance": 0.4701,
    "contrast": {
      "black": 10.4,
      "white": 2.02
    },
    "wcag": {
      "AA": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "AAA": [
        "#000000",
        "#1A1A1A"
      ]
    }
  },
  {
    "name": "Palette color 3",
    "hex": "#2EB67D",
    "rgb": [
      46,
      182,
      125
    ],
    "hsl": [
      155,
      60,
      45
    ],
    "cmyk": [
      75,
      0,
      31,
      29
    ],
    "luminance": 0.3552,
    "contrast": {
      "black": 8.1,
      "white": 2.59
    },
    "wcag": {
      "AA": [
        "#000000",
        "#1A1A1A"
      ],
      "AAA": [
        "#000000"
      ]
    }
  },
  {
    "name": "Palette color 4",
    "hex": "#ECB22E",
    "rgb": [
      236,
      178,
      46
    ],
    "hsl": [
      42,
      83,
      55
    ],
    "cmyk": [
      0,
      25,
      81,
      7
    ],
    "luminance": 0.4987,
    "contrast": {
      "black": 10.97,
      "white": 1.91
    },
    "wcag": {
      "AA": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "AAA": [
        "#000000",
        "#1A1A1A"
      ]
    }
  },
  {
    "name": "Palette color 5",
    "hex": "#E01E5A",
    "rgb": [
      224,
      30,
      90
    ],
    "hsl": [
      341,
      76,
      50
    ],
    "cmyk": [
      0,
      87,
      60,
      12
    ],
    "luminance": 0.1751,
    "contrast": {
      "black": 4.5,
      "white": 4.66
    },
    "wcag": {
      "AA": [
        "#000000",
        "#FFFFFF"
      ],
      "AAA": []
    }
  }
]
AI context
{
  "brandUseCases": [
    "SaaS UI",
    "developer tools",
    "product branding",
    "brand reference",
    "design systems",
    "CSS tokens",
    "accessibility checks"
  ],
  "semanticGroups": [
    "technology brand colors",
    "pink brand palette",
    "cyan brand palette",
    "green brand palette",
    "orange brand palette",
    "warm brand palette",
    "cool brand palette",
    "dark brand color",
    "vibrant brand color",
    "earth tone brand color",
    "jewel tone brand color",
    "Slack color reference"
  ],
  "contrastSafeWith": [
    "#FFFFFF",
    "#F5F5F5",
    "#000000",
    "#1A1A1A",
    "#36454F"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/brand-colors/slack.json",
    "https://www.colorsencyclopedia.com/api/brand-colors.json"
  ]
}
CSS tokens
{
  "css": "--brand-slack-1: #4A154B;\n--brand-slack-2: #36C5F0;\n--brand-slack-3: #2EB67D;\n--brand-slack-4: #ECB22E;\n--brand-slack-5: #E01E5A;"
}
Accessibility
[
  {
    "hex": "#4A154B",
    "contrast": {
      "black": 1.5,
      "white": 14
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    }
  },
  {
    "hex": "#36C5F0",
    "contrast": {
      "black": 10.4,
      "white": 2.02
    },
    "wcag": {
      "AA": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "AAA": [
        "#000000",
        "#1A1A1A"
      ]
    }
  },
  {
    "hex": "#2EB67D",
    "contrast": {
      "black": 8.1,
      "white": 2.59
    },
    "wcag": {
      "AA": [
        "#000000",
        "#1A1A1A"
      ],
      "AAA": [
        "#000000"
      ]
    }
  },
  {
    "hex": "#ECB22E",
    "contrast": {
      "black": 10.97,
      "white": 1.91
    },
    "wcag": {
      "AA": [
        "#000000",
        "#1A1A1A",
        "#36454F"
      ],
      "AAA": [
        "#000000",
        "#1A1A1A"
      ]
    }
  },
  {
    "hex": "#E01E5A",
    "contrast": {
      "black": 4.5,
      "white": 4.66
    },
    "wcag": {
      "AA": [
        "#000000",
        "#FFFFFF"
      ],
      "AAA": []
    }
  }
]
Full JSON dataset 
{
  "slug": "slack",
  "name": "Slack",
  "category": "technology",
  "brandCategory": [
    "Technology",
    "technology"
  ],
  "disclaimer": "Commonly referenced brand color values. This page is an independent technical reference and is not affiliated with or endorsed by Slack.",
  "datasetVersion": "1.0.0",
  "url": "https://www.colorsencyclopedia.com/brand-colors/slack/",
  "categoryUrl": "https://www.colorsencyclopedia.com/brand-colors/technology/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/brand-colors/slack.json",
  "colors": [
    {
      "name": "Palette color 1",
      "hex": "#4A154B",
      "rgb": [
        74,
        21,
        75
      ],
      "hsl": [
        299,
        56,
        19
      ],
      "cmyk": [
        1,
        72,
        0,
        71
      ],
      "luminance": 0.025,
      "contrast": {
        "black": 1.5,
        "white": 14
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      }
    },
    {
      "name": "Palette color 2",
      "hex": "#36C5F0",
      "rgb": [
        54,
        197,
        240
      ],
      "hsl": [
        194,
        86,
        58
      ],
      "cmyk": [
        78,
        18,
        0,
        6
      ],
      "luminance": 0.4701,
      "contrast": {
        "black": 10.4,
        "white": 2.02
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ],
        "AAA": [
          "#000000",
          "#1A1A1A"
        ]
      }
    },
    {
      "name": "Palette color 3",
      "hex": "#2EB67D",
      "rgb": [
        46,
        182,
        125
      ],
      "hsl": [
        155,
        60,
        45
      ],
      "cmyk": [
        75,
        0,
        31,
        29
      ],
      "luminance": 0.3552,
      "contrast": {
        "black": 8.1,
        "white": 2.59
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A"
        ],
        "AAA": [
          "#000000"
        ]
      }
    },
    {
      "name": "Palette color 4",
      "hex": "#ECB22E",
      "rgb": [
        236,
        178,
        46
      ],
      "hsl": [
        42,
        83,
        55
      ],
      "cmyk": [
        0,
        25,
        81,
        7
      ],
      "luminance": 0.4987,
      "contrast": {
        "black": 10.97,
        "white": 1.91
      },
      "wcag": {
        "AA": [
          "#000000",
          "#1A1A1A",
          "#36454F"
        ],
        "AAA": [
          "#000000",
          "#1A1A1A"
        ]
      }
    },
    {
      "name": "Palette color 5",
      "hex": "#E01E5A",
      "rgb": [
        224,
        30,
        90
      ],
      "hsl": [
        341,
        76,
        50
      ],
      "cmyk": [
        0,
        87,
        60,
        12
      ],
      "luminance": 0.1751,
      "contrast": {
        "black": 4.5,
        "white": 4.66
      },
      "wcag": {
        "AA": [
          "#000000",
          "#FFFFFF"
        ],
        "AAA": []
      }
    }
  ],
  "brandUseCases": [
    "SaaS UI",
    "developer tools",
    "product branding",
    "brand reference",
    "design systems",
    "CSS tokens",
    "accessibility checks"
  ],
  "semanticGroups": [
    "technology brand colors",
    "pink brand palette",
    "cyan brand palette",
    "green brand palette",
    "orange brand palette",
    "warm brand palette",
    "cool brand palette",
    "dark brand color",
    "vibrant brand color",
    "earth tone brand color",
    "jewel tone brand color",
    "Slack color reference"
  ],
  "contrastSafeWith": [
    "#FFFFFF",
    "#F5F5F5",
    "#000000",
    "#1A1A1A",
    "#36454F"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/brand-colors/slack.json",
    "https://www.colorsencyclopedia.com/api/brand-colors.json"
  ]
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

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