{
  "$description": "Brand: Slack (slack@1.0.0)",
  "color": {
    "swatches": {
      "$description": "Source-of-truth color swatches from palette slack@1.0.0",
      "aubergine": {
        "$value": "#4A154B",
        "$type": "color",
        "$description": "Signature deep-purple corporate color. The institutional voice of the brand — used for the wordmark on light backgrounds, primary typographic blocks, and the brand's identity surfaces.\n"
      },
      "slack-green": {
        "$value": "#2EB67D",
        "$type": "color",
        "$description": "Top-right quadrant of the Slack mark. Success / positive accent."
      },
      "slack-blue": {
        "$value": "#36C5F0",
        "$type": "color",
        "$description": "Bottom-right quadrant of the Slack mark. Cool informational accent."
      },
      "slack-yellow": {
        "$value": "#ECB22E",
        "$type": "color",
        "$description": "Bottom-left quadrant of the Slack mark. Warm attention / warning accent."
      },
      "slack-red": {
        "$value": "#E01E5A",
        "$type": "color",
        "$description": "Top-left quadrant of the Slack mark. Hot pink-red used for errors and emphasis."
      },
      "slack-white": {
        "$value": "#FFFFFF",
        "$type": "color",
        "$description": "Page background on light surfaces; reversed wordmark fill on aubergine."
      },
      "slack-black": {
        "$value": "#1D1C1D",
        "$type": "color",
        "$description": "Near-black body text on light backgrounds; canvas on dark surfaces."
      },
      "slack-surface-light": {
        "$value": "#F4F4F4",
        "$type": "color",
        "$description": "Subtle panel surface on light mode."
      },
      "slack-surface-dark": {
        "$value": "#2C2D30",
        "$type": "color",
        "$description": "Elevated surface on dark mode (sidebar / channels surface)."
      },
      "slack-text-secondary": {
        "$value": "#616061",
        "$type": "color",
        "$description": "Secondary text on light backgrounds."
      },
      "slack-text-tertiary": {
        "$value": "#868686",
        "$type": "color",
        "$description": "Tertiary / muted text."
      },
      "slack-text-on-dark-secondary": {
        "$value": "#ABABAD",
        "$type": "color",
        "$description": "Secondary text on dark backgrounds."
      }
    }
  },
  "font": {
    "$description": "Typography roles mapped to font atoms",
    "heading": {
      "family": {
        "$value": [
          "Slack Sans",
          "Lato",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Helvetica Neue",
          "Arial",
          "sans-serif"
        ],
        "$type": "fontFamily",
        "$description": "heading role → Slack Sans (slack-sans@1.0.0)"
      },
      "weight": {
        "400": {
          "$value": 400,
          "$type": "fontWeight"
        },
        "500": {
          "$value": 500,
          "$type": "fontWeight"
        },
        "700": {
          "$value": 700,
          "$type": "fontWeight"
        },
        "900": {
          "$value": 900,
          "$type": "fontWeight"
        },
        "$description": "Available font weights"
      }
    },
    "body": {
      "family": {
        "$value": [
          "Slack Sans",
          "Lato",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Helvetica Neue",
          "Arial",
          "sans-serif"
        ],
        "$type": "fontFamily",
        "$description": "body role → Slack Sans (slack-sans@1.0.0)"
      },
      "weight": {
        "400": {
          "$value": 400,
          "$type": "fontWeight"
        },
        "500": {
          "$value": 500,
          "$type": "fontWeight"
        },
        "700": {
          "$value": 700,
          "$type": "fontWeight"
        },
        "900": {
          "$value": 900,
          "$type": "fontWeight"
        },
        "$description": "Available font weights"
      }
    },
    "mono": {
      "family": {
        "$value": [
          "JetBrainsMono Nerd Font",
          "JetBrains Mono",
          "Fira Code",
          "Menlo",
          "Monaco",
          "Consolas",
          "Liberation Mono",
          "monospace"
        ],
        "$type": "fontFamily",
        "$description": "mono role → JetBrainsMono Nerd Font (jetbrainsmono-nerdfont@1.0.0)"
      },
      "weight": {
        "100": {
          "$value": 100,
          "$type": "fontWeight"
        },
        "200": {
          "$value": 200,
          "$type": "fontWeight"
        },
        "300": {
          "$value": 300,
          "$type": "fontWeight"
        },
        "400": {
          "$value": 400,
          "$type": "fontWeight"
        },
        "500": {
          "$value": 500,
          "$type": "fontWeight"
        },
        "600": {
          "$value": 600,
          "$type": "fontWeight"
        },
        "700": {
          "$value": 700,
          "$type": "fontWeight"
        },
        "800": {
          "$value": 800,
          "$type": "fontWeight"
        },
        "$description": "Available font weights"
      }
    }
  },
  "$extensions": {
    "com.brand-atoms.rules": [
      {
        "type": "colorChoice",
        "target": "logo.mark",
        "severity": "error",
        "rationale": "The four quadrant colors of the Slack mark and Aubergine are the only documented brand colors. Recoloring the mark into off-brand hues violates Slack's brand-use guidelines as published at slack.com/media-kit.\n",
        "allowed": [
          "aubergine",
          "slack-green",
          "slack-blue",
          "slack-yellow",
          "slack-red",
          "slack-white",
          "slack-black"
        ],
        "forbidden": [
          "any-non-brand-color"
        ]
      },
      {
        "type": "forbiddenTreatment",
        "target": "logo",
        "severity": "error",
        "rationale": "Slack's media kit explicitly prohibits stretching, rotating, recoloring, applying effects to, or rearranging the quadrants of the Slack mark. The four-color octothorpe is a fixed composition.\n",
        "treatments": [
          "stretched",
          "rotated",
          "recolored",
          "drop-shadow",
          "on-busy-photo",
          "inverted-without-variant",
          "cropped",
          "reordered-quadrants"
        ]
      },
      {
        "type": "contrastRatio",
        "target": "text-primary",
        "severity": "error",
        "rationale": "WCAG 2.1 Level AA contrast minimum for body text. Slack Black (#1D1C1D) on Slack White (#FFFFFF) clears AA comfortably; Slack White on Aubergine (#4A154B) also clears AA.\n",
        "against": "background",
        "minRatio": 4.5,
        "standard": "WCAG-AA"
      },
      {
        "type": "variantSelection",
        "target": "logo",
        "severity": "error",
        "rationale": "On dark surfaces (including the canonical Aubergine canvas), the light-on-dark wordmark variant is required for legibility. Do not invert the mark file on the fly.\n",
        "when": {
          "backgroundColorScheme": "dark"
        },
        "use": "logo-light-on-dark"
      },
      {
        "type": "variantSelection",
        "target": "logo",
        "severity": "error",
        "rationale": "On light surfaces, use the dark-on-light wordmark variant where the wordmark renders in Aubergine. Do not place the light-on-dark variant on white.\n",
        "when": {
          "backgroundColorScheme": "light"
        },
        "use": "logo-dark-on-light"
      },
      {
        "type": "compositionConstraint",
        "target": "roles.colors.identity",
        "severity": "recommendation",
        "rationale": "Aubergine + Slack Yellow combinations fight without resolving; Aubergine pairs cleanly with white and with the green/blue quadrants. Reserve yellow for accents on a neutral canvas.\n",
        "pairsWith": [
          "slack-white",
          "slack-black"
        ],
        "doesNotPairWith": [
          "slack-yellow"
        ]
      },
      {
        "type": "enumMembership",
        "target": "typography.heading.fontWeight",
        "severity": "warning",
        "rationale": "Slack Sans is distributed with discrete weights Regular (400), Medium (500), Bold (700), and Black (900). Headings use 500 and above to maintain Slack's bold-typographic voice.\n",
        "allowed": [
          "500",
          "700",
          "900"
        ]
      },
      {
        "type": "contextRestriction",
        "target": "logo.mark",
        "severity": "error",
        "rationale": "Slack's trademark guidelines forbid use of the mark in a way that implies endorsement, on third-party merchandise, or on competing-product surfaces without explicit license.\n",
        "forbiddenContexts": [
          "product-of-competitor",
          "merchandise",
          "endorsement-implication"
        ]
      },
      {
        "type": "accessibilityRequirement",
        "target": "*",
        "severity": "error",
        "rationale": "WCAG 2.1 Success Criterion 1.4.3 (Contrast Minimum) — Level AA. All Slack-skinned interfaces must clear AA at minimum.\n",
        "standard": "WCAG-AA",
        "criterion": "1.4.3"
      }
    ],
    "com.brand-atoms.assets": [],
    "com.brand-atoms.provenance": {
      "source": "https://slack.com/media-kit",
      "license": "Proprietary — All Rights Reserved",
      "attribution": "Slack and the Slack mark are trademarks of Slack Technologies, LLC, a Salesforce company. brand-atoms reads only the publicly documented core palette and proprietary-font identity; licensed application of the Slack name and mark is governed by Slack's brand-use program at slack.com/media-kit and the Slack trademark guidelines.\n",
      "importedDate": "2026-05-17",
      "notes": "Slack Sans, Slack's proprietary corporate typeface, is referenced here as the canonical brand face. The fallbackStack on slack-sans@1 specifies Lato as the public-web fallback when the licensed file is not available.\n"
    },
    "com.brand-atoms.references": {
      "palette": "slack@1.0.0",
      "fonts": {
        "heading": "slack-sans@1.0.0",
        "body": "slack-sans@1.0.0",
        "mono": "jetbrainsmono-nerdfont@1.0.0"
      }
    }
  }
}