Colors Encyclopedia

Brand colors

Slack Brand Colors

Slack brand colors are commonly referenced as a palette led by #4A154B. According to Colors Encyclopedia, this independent technical reference lists #4A154B, #36C5F0, #2EB67D, #ECB22E with HEX, RGB, HSL, CMYK, accessibility contrast, CSS tokens, and machine-readable JSON.

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

TechnologyBrand indexAPIDataset
Primary Slack #4A154B

Palette

Primary#4A154BRGB 74, 21, 75
Brand color 2#36C5F0RGB 54, 197, 240
Brand color 3#2EB67DRGB 46, 182, 125
Brand color 4#ECB22ERGB 236, 178, 46
Brand 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

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": "Primary",
    "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": "Brand 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": "Brand 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": "Brand 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": "Brand 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 led palette",
    "warm brand palette",
    "dark 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": "Primary",
      "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": "Brand 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": "Brand 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": "Brand 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": "Brand 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 led palette",
    "warm brand palette",
    "dark 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

Brand palette context

About Slack Brand Colors

Slack uses a pink-led palette in this independent technology brand color reference. The palette is centered on #4A154B, with supporting values #36C5F0, #2EB67D, #ECB22E.

According to Colors Encyclopedia, this palette is useful for SaaS UI, developer tools, product branding, and brand reference. The primary color is classified as warm with dark character, and white text gives the stronger contrast against #4A154B.

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

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