{
  "id": "anthropic",
  "version": "1.0.0",
  "name": "Anthropic",
  "description": "Anthropic is an AI safety company and the maker of Claude — a family of large language models built with constitutional AI and safety research as first-class concerns. The brand voice is serious, considered, and humane: long-form reasoning over marketing copy, transparency about limits, deference to the reader. Visually, Anthropic is paper-toned and warm — a cream \"Ivory\" canvas, deep \"Slate\" text, and Claude's signature terracotta \"Clay\" as the primary accent, supported by a muted natural-world secondary scale (Oat, Manilla, Olive, Cactus, Sky, Heather, Fig, Coral). Typography is the proprietary Anthropic Sans / Anthropic Serif / Anthropic Mono family.\n",
  "provenance": {
    "source": "https://www.anthropic.com/",
    "license": "Proprietary — All Rights Reserved",
    "attribution": "Anthropic, PBC — visual identity captured from the deployed stylesheet on anthropic.com (--swatch-*, --_typography-*, --_color-theme-* token families). Anthropic, Claude, and associated marks are property of Anthropic.\n",
    "importedDate": "2026-05-17",
    "notes": "The proprietary brand typefaces (Anthropic Sans, Anthropic Serif, Anthropic Mono) are declared on anthropic.com via @font-face but are not publicly distributed. This atom references Inter@1 as the open-source rendering substitute for the sans roles and notes the proprietary primaries here.\n"
  },
  "tags": [
    "anthropic",
    "claude",
    "ai",
    "safety",
    "brand",
    "warm",
    "paper",
    "light-first"
  ],
  "palette": {
    "ref": "anthropic@1.0.0",
    "swatches": [
      {
        "id": "ivory-light",
        "name": "Ivory Light",
        "value": "#FAF9F5",
        "description": "Page canvas — the warm cream Anthropic uses as the base.",
        "aliases": []
      },
      {
        "id": "ivory-medium",
        "name": "Ivory Medium",
        "value": "#F0EEE6",
        "description": "Subtle elevated surface; hover state for ivory buttons.",
        "aliases": []
      },
      {
        "id": "ivory-dark",
        "name": "Ivory Dark",
        "value": "#E8E6DC",
        "description": "Border / quiet divider on ivory canvas.",
        "aliases": []
      },
      {
        "id": "slate-dark",
        "name": "Slate Dark",
        "value": "#141413",
        "description": "Primary text on ivory; canvas in dark mode.",
        "aliases": []
      },
      {
        "id": "slate-medium",
        "name": "Slate Medium",
        "value": "#3D3D3A",
        "description": "Elevated surface in dark mode; secondary text on ivory.",
        "aliases": []
      },
      {
        "id": "slate-light",
        "name": "Slate Light",
        "value": "#5E5D59",
        "description": "Tertiary text; hover state for slate surfaces.",
        "aliases": []
      },
      {
        "id": "cloud-light",
        "name": "Cloud Light",
        "value": "#D1CFC5",
        "description": "Soft neutral, illustration mid-tone.",
        "aliases": []
      },
      {
        "id": "cloud-medium",
        "name": "Cloud Medium",
        "value": "#B0AEA5",
        "description": "Mid cloud — secondary text on dark surfaces.",
        "aliases": []
      },
      {
        "id": "cloud-dark",
        "name": "Cloud Dark",
        "value": "#87867F",
        "description": "Deep cloud — quiet text on warm surfaces.",
        "aliases": []
      },
      {
        "id": "clay",
        "name": "Clay",
        "value": "#D97757",
        "description": "Claude's signature terracotta accent. The brand's primary warm.",
        "aliases": []
      },
      {
        "id": "accent",
        "name": "Accent",
        "value": "#C6613F",
        "description": "Pressed / active variant of clay.",
        "aliases": []
      },
      {
        "id": "oat",
        "name": "Oat",
        "value": "#E3DACC",
        "description": "Wheaten neutral, illustration warm.",
        "aliases": []
      },
      {
        "id": "manilla",
        "name": "Manilla",
        "value": "#EBDBBC",
        "description": "Pale parchment yellow.",
        "aliases": []
      },
      {
        "id": "kraft",
        "name": "Kraft",
        "value": "#D4A27F",
        "description": "Tan / craft-paper warm.",
        "aliases": []
      },
      {
        "id": "olive",
        "name": "Olive",
        "value": "#788C5D",
        "description": "Muted green secondary.",
        "aliases": []
      },
      {
        "id": "cactus",
        "name": "Cactus",
        "value": "#BCD1CA",
        "description": "Pale sage.",
        "aliases": []
      },
      {
        "id": "sky",
        "name": "Sky",
        "value": "#6A9BCC",
        "description": "Mid blue secondary.",
        "aliases": []
      },
      {
        "id": "heather",
        "name": "Heather",
        "value": "#CBCADB",
        "description": "Pale lavender.",
        "aliases": []
      },
      {
        "id": "fig",
        "name": "Fig",
        "value": "#C46686",
        "description": "Muted rose-magenta.",
        "aliases": []
      },
      {
        "id": "coral",
        "name": "Coral",
        "value": "#EBCECE",
        "description": "Pale coral pink — pairs with clay.",
        "aliases": []
      }
    ],
    "modes": {
      "light": {
        "roles": {
          "background": "ivory-light",
          "surface": "ivory-medium",
          "surface-elevated": "ivory-light",
          "text-primary": "slate-dark",
          "text-secondary": "slate-medium",
          "text-tertiary": "slate-light",
          "primary": "clay",
          "primary-hover": "accent",
          "accent": "clay",
          "accent-hover": "accent",
          "warning": "kraft",
          "warning-hover": "accent",
          "error": "fig",
          "success": "olive",
          "border": "ivory-dark"
        }
      },
      "dark": {
        "roles": {
          "background": "slate-dark",
          "surface": "slate-medium",
          "surface-elevated": "slate-light",
          "text-primary": "ivory-light",
          "text-secondary": "cloud-medium",
          "text-tertiary": "cloud-dark",
          "primary": "clay",
          "primary-hover": "accent",
          "accent": "clay",
          "accent-hover": "accent",
          "warning": "manilla",
          "warning-hover": "kraft",
          "error": "fig",
          "success": "cactus",
          "border": "slate-light"
        }
      }
    }
  },
  "fonts": [
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      "ref": "inter@1.0.0",
      "family": "Inter",
      "classification": "sans-serif",
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        "url": "https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap"
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      "fallbackStack": [
        "-apple-system",
        "BlinkMacSystemFont",
        "Segoe UI",
        "Roboto",
        "Helvetica Neue",
        "Arial",
        "sans-serif"
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      "availableStyles": [
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          "weight": 100,
          "style": "normal"
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          "weight": 100,
          "style": "italic"
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          "weight": 200,
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      "ref": "inter@1.0.0",
      "family": "Inter",
      "classification": "sans-serif",
      "source": {
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        "family": "Inter",
        "url": "https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap"
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      "fallbackStack": [
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        "BlinkMacSystemFont",
        "Segoe UI",
        "Roboto",
        "Helvetica Neue",
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      "availableStyles": [
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      "role": "mono",
      "ref": "jetbrainsmono-nerdfont@1.0.0",
      "family": "JetBrainsMono Nerd Font",
      "classification": "monospace",
      "source": {
        "kind": "external",
        "family": "JetBrainsMono Nerd Font",
        "notes": "Nerd-Font-patched build of JetBrains Mono. Not available via Google Fonts. Download woff2/ttf files from the Nerd Fonts GitHub release and self-host, or install system-wide for terminal/IDE use.\n"
      },
      "fallbackStack": [
        "JetBrains Mono",
        "Fira Code",
        "Menlo",
        "Monaco",
        "Consolas",
        "Liberation Mono",
        "monospace"
      ],
      "availableStyles": [
        {
          "weight": 100,
          "style": "normal"
        },
        {
          "weight": 100,
          "style": "italic"
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        {
          "weight": 200,
          "style": "normal"
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        {
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          "style": "italic"
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        {
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          "style": "normal"
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          "style": "italic"
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          "style": "normal"
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          "style": "italic"
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          "style": "normal"
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          "style": "italic"
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          "style": "normal"
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  ],
  "roles": {
    "colors": {
      "identity": "ivory-light",
      "on-identity": "slate-dark",
      "primary": "clay",
      "primary-hover": "accent",
      "accent": "clay",
      "accent-hover": "accent",
      "mark": "clay",
      "success": "olive",
      "warning": "kraft",
      "error": "fig",
      "text-primary-light": "slate-dark",
      "text-primary-dark": "ivory-light",
      "background-light": "ivory-light",
      "background-dark": "slate-dark",
      "surface-light": "ivory-medium",
      "surface-dark": "slate-medium",
      "text-secondary-light": "slate-medium",
      "text-tertiary-light": "slate-light",
      "border-light": "ivory-dark"
    },
    "typography": {
      "display": "heading",
      "prose": "body",
      "code": "mono"
    }
  },
  "assets": [],
  "rules": [
    {
      "type": "contrastRatio",
      "target": "text-primary",
      "severity": "error",
      "rationale": "Slate Dark (#141413) on Ivory Light (#FAF9F5) gives ~17:1 — clears AAA decisively. The brand's deliberate, long-form reading posture justifies an AAA contrast target rather than the AA floor.\n",
      "against": "background",
      "minRatio": 7,
      "standard": "WCAG-AAA"
    },
    {
      "type": "colorChoice",
      "target": "roles.colors.primary",
      "severity": "error",
      "rationale": "Clay (#D97757) is Claude's signature warm. The other secondary swatches appear in illustration and surface accents only — fig as muted-rose, coral as pale pink, kraft as tan — and must not stand in for the primary brand action color.\n",
      "allowed": [
        "clay",
        "accent"
      ],
      "forbidden": [
        "fig",
        "coral",
        "kraft",
        "sky",
        "olive"
      ]
    },
    {
      "type": "colorChoice",
      "target": "roles.colors.mark",
      "severity": "error",
      "rationale": "The Claude / Anthropic mark fill is clay specifically. The pressed `accent` variant is reserved for hover/active states on interactive surfaces, not for the mark itself.\n",
      "allowed": [
        "clay"
      ],
      "forbidden": [
        "accent",
        "fig",
        "coral",
        "kraft",
        "olive",
        "sky"
      ]
    },
    {
      "type": "forbiddenTreatment",
      "target": "logo",
      "severity": "error",
      "rationale": "Anthropic's identity is restrained by design. Recolored, skewed, or gradient-filled marks conflict with the brand's humane, considered voice.\n",
      "treatments": [
        "stretched",
        "rotated",
        "recolored",
        "drop-shadow",
        "gradient-fill",
        "on-busy-photo"
      ]
    },
    {
      "type": "enumMembership",
      "target": "typography.heading.fontWeight",
      "severity": "warning",
      "rationale": "Anthropic's marketing site uses Regular (400), Medium (500), SemiBold (600), and Bold (700) — declared on the live stylesheet as --_typography---font--display-sans-regular through --display-sans-bold. Heavier display weights are not in the licensed variable-font cut.\n",
      "allowed": [
        "400",
        "500",
        "600",
        "700"
      ]
    },
    {
      "type": "fontPairing",
      "target": "typography.display",
      "severity": "error",
      "rationale": "The Anthropic Sans display face pairs with Anthropic Serif for long-form prose on anthropic.com. A 1.5× minimum display-to-prose size ratio preserves the typographic hierarchy when the serif is rendered alongside the sans headlines.\n",
      "requires": "prose",
      "minSizeRatio": 1.5
    },
    {
      "type": "accessibilityRequirement",
      "target": "*",
      "severity": "warning",
      "rationale": "WCAG 2.1 Success Criterion 1.4.6 (Contrast Enhanced) — Level AAA. The brand's long-form, considered posture and research-document aesthetic justify the enhanced 7:1 target rather than the AA 4.5:1 floor.\n",
      "standard": "WCAG-AAA",
      "criterion": "1.4.6"
    },
    {
      "type": "contextRestriction",
      "target": "roles.colors.success",
      "severity": "error",
      "rationale": "Olive (#788C5D) is the muted-green secondary used for confirmation and positive data points. It is NOT the error color (use fig). Reusing it for failure states conflicts with the established positive-natural meaning.\n",
      "allowedContexts": [
        "confirmation",
        "completion",
        "data-viz-positive"
      ],
      "forbiddenContexts": [
        "error-state",
        "destructive-action"
      ]
    },
    {
      "type": "compositionConstraint",
      "target": "roles.colors.primary",
      "severity": "recommendation",
      "rationale": "Clay reads cleanest against the ivory canvas or the slate dark canvas. Pairing it adjacent to fig (rose-magenta), sky (blue), or heather (lavender) introduces a chromatic conflict that fights for attention without resolving into hierarchy.\n",
      "pairsWith": [
        "ivory-light",
        "ivory-medium",
        "slate-dark"
      ],
      "doesNotPairWith": [
        "fig",
        "sky",
        "heather"
      ]
    }
  ]
}