{
  "id": "trello",
  "version": "1.0.0",
  "name": "Trello",
  "description": "Trello is a card-and-board work-management tool — the kanban app that made boards mainstream — owned by Atlassian since the 2017 acquisition. The brand voice is friendly, playful, and direct. Visually, Trello carries its own signature blue mark (#0079BF) while sharing the Atlassian Design product surface language — clean white canvases, near-black body text, and a disciplined neutral system.\n",
  "provenance": {
    "source": "https://atlassian.design/",
    "license": "Proprietary — All Rights Reserved",
    "attribution": "Trello and the Trello logo are trademarks of Atlassian Pty Ltd. The primary brand color Trello Blue (#0079BF) is documented in Trello's brand surfaces; the surrounding product design language is documented at Atlassian Design (atlassian.design). brand-atoms catalogues only the publicly documented signature color and authored neutrals; licensed application of the Trello name and mark is governed by Atlassian's brand-use guidance.\n",
    "importedDate": "2026-05-18",
    "notes": "Trello's product surfaces render in a neutral humanist sans consistent with Inter; Inter is referenced here as the primary face and is already in the brand-atoms catalog. Atlassian's Charlie Display proprietary face is used on some marketing surfaces; consumers with a licensed Charlie Display file should override this reference at consumption time.\n"
  },
  "tags": [
    "saas",
    "productivity",
    "trello",
    "atlassian",
    "kanban"
  ],
  "palette": {
    "ref": "trello@1.0.0",
    "swatches": [
      {
        "id": "trello-blue",
        "name": "Trello Blue",
        "value": "#0079BF",
        "description": "Signature Trello board-blue. Primary brand color — used on the wordmark, the kanban-card mark, and primary brand surfaces.\n",
        "aliases": []
      },
      {
        "id": "trello-white",
        "name": "Trello White",
        "value": "#FFFFFF",
        "description": "Canvas on light surfaces; reversed wordmark fill.",
        "aliases": []
      },
      {
        "id": "trello-black",
        "name": "Trello Black",
        "value": "#172B4D",
        "description": "Near-black body text — Atlassian Design's documented neutral text tone.",
        "aliases": []
      },
      {
        "id": "trello-canvas-dark",
        "name": "Trello Canvas Dark",
        "value": "#1D2125",
        "description": "Authored dark-mode canvas — Atlassian Design's documented dark canvas.",
        "aliases": []
      },
      {
        "id": "trello-surface-light",
        "name": "Trello Surface Light",
        "value": "#F4F5F7",
        "description": "Authored panel surface for light mode — Atlassian Design's documented N20 neutral.",
        "aliases": []
      },
      {
        "id": "trello-surface-dark",
        "name": "Trello Surface Dark",
        "value": "#22272B",
        "description": "Authored elevated surface on dark mode.",
        "aliases": []
      },
      {
        "id": "trello-text-secondary",
        "name": "Trello Text Secondary",
        "value": "#5E6C84",
        "description": "Authored secondary text — Atlassian Design's documented secondary text tone.",
        "aliases": []
      },
      {
        "id": "trello-text-tertiary",
        "name": "Trello Text Tertiary",
        "value": "#8993A4",
        "description": "Authored tertiary / muted text.",
        "aliases": []
      },
      {
        "id": "trello-blue-hover",
        "name": "Trello Blue Hover",
        "value": "#2890CC",
        "description": "Authored softer Trello Blue for hover / active states.",
        "aliases": []
      }
    ],
    "modes": {
      "light": {
        "roles": {
          "background": "trello-white",
          "surface": "trello-surface-light",
          "surface-elevated": "trello-white",
          "text-primary": "trello-black",
          "text-secondary": "trello-text-secondary",
          "text-tertiary": "trello-text-tertiary",
          "primary": "trello-blue",
          "primary-hover": "trello-blue-hover",
          "accent": "trello-blue",
          "accent-hover": "trello-blue-hover",
          "warning": "trello-blue",
          "warning-hover": "trello-blue-hover",
          "error": "trello-blue",
          "success": "trello-blue"
        }
      },
      "dark": {
        "roles": {
          "background": "trello-canvas-dark",
          "surface": "trello-surface-dark",
          "surface-elevated": "trello-surface-dark",
          "text-primary": "trello-white",
          "text-secondary": "trello-text-tertiary",
          "text-tertiary": "trello-text-secondary",
          "primary": "trello-blue",
          "primary-hover": "trello-blue-hover",
          "accent": "trello-blue",
          "accent-hover": "trello-blue-hover",
          "warning": "trello-blue",
          "warning-hover": "trello-blue-hover",
          "error": "trello-blue",
          "success": "trello-blue"
        }
      }
    }
  },
  "fonts": [
    {
      "role": "heading",
      "ref": "inter@1.0.0",
      "family": "Inter",
      "classification": "sans-serif",
      "source": {
        "kind": "google-fonts",
        "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"
      },
      "fallbackStack": [
        "-apple-system",
        "BlinkMacSystemFont",
        "Segoe UI",
        "Roboto",
        "Helvetica Neue",
        "Arial",
        "sans-serif"
      ],
      "availableStyles": [
        {
          "weight": 100,
          "style": "normal"
        },
        {
          "weight": 100,
          "style": "italic"
        },
        {
          "weight": 200,
          "style": "normal"
        },
        {
          "weight": 200,
          "style": "italic"
        },
        {
          "weight": 300,
          "style": "normal"
        },
        {
          "weight": 300,
          "style": "italic"
        },
        {
          "weight": 400,
          "style": "normal"
        },
        {
          "weight": 400,
          "style": "italic"
        },
        {
          "weight": 500,
          "style": "normal"
        },
        {
          "weight": 500,
          "style": "italic"
        },
        {
          "weight": 600,
          "style": "normal"
        },
        {
          "weight": 600,
          "style": "italic"
        },
        {
          "weight": 700,
          "style": "normal"
        },
        {
          "weight": 700,
          "style": "italic"
        },
        {
          "weight": 800,
          "style": "normal"
        },
        {
          "weight": 800,
          "style": "italic"
        },
        {
          "weight": 900,
          "style": "normal"
        },
        {
          "weight": 900,
          "style": "italic"
        }
      ]
    },
    {
      "role": "body",
      "ref": "inter@1.0.0",
      "family": "Inter",
      "classification": "sans-serif",
      "source": {
        "kind": "google-fonts",
        "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"
      },
      "fallbackStack": [
        "-apple-system",
        "BlinkMacSystemFont",
        "Segoe UI",
        "Roboto",
        "Helvetica Neue",
        "Arial",
        "sans-serif"
      ],
      "availableStyles": [
        {
          "weight": 100,
          "style": "normal"
        },
        {
          "weight": 100,
          "style": "italic"
        },
        {
          "weight": 200,
          "style": "normal"
        },
        {
          "weight": 200,
          "style": "italic"
        },
        {
          "weight": 300,
          "style": "normal"
        },
        {
          "weight": 300,
          "style": "italic"
        },
        {
          "weight": 400,
          "style": "normal"
        },
        {
          "weight": 400,
          "style": "italic"
        },
        {
          "weight": 500,
          "style": "normal"
        },
        {
          "weight": 500,
          "style": "italic"
        },
        {
          "weight": 600,
          "style": "normal"
        },
        {
          "weight": 600,
          "style": "italic"
        },
        {
          "weight": 700,
          "style": "normal"
        },
        {
          "weight": 700,
          "style": "italic"
        },
        {
          "weight": 800,
          "style": "normal"
        },
        {
          "weight": 800,
          "style": "italic"
        },
        {
          "weight": 900,
          "style": "normal"
        },
        {
          "weight": 900,
          "style": "italic"
        }
      ]
    },
    {
      "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"
        },
        {
          "weight": 200,
          "style": "normal"
        },
        {
          "weight": 200,
          "style": "italic"
        },
        {
          "weight": 300,
          "style": "normal"
        },
        {
          "weight": 300,
          "style": "italic"
        },
        {
          "weight": 400,
          "style": "normal"
        },
        {
          "weight": 400,
          "style": "italic"
        },
        {
          "weight": 500,
          "style": "normal"
        },
        {
          "weight": 500,
          "style": "italic"
        },
        {
          "weight": 600,
          "style": "normal"
        },
        {
          "weight": 600,
          "style": "italic"
        },
        {
          "weight": 700,
          "style": "normal"
        },
        {
          "weight": 700,
          "style": "italic"
        },
        {
          "weight": 800,
          "style": "normal"
        },
        {
          "weight": 800,
          "style": "italic"
        }
      ]
    }
  ],
  "roles": {
    "colors": {
      "identity": "trello-blue",
      "on-identity": "trello-white",
      "primary": "trello-blue",
      "primary-hover": "trello-blue-hover",
      "accent": "trello-blue",
      "accent-hover": "trello-blue-hover",
      "success": "trello-blue",
      "warning": "trello-blue",
      "error": "trello-blue",
      "background-light": "trello-white",
      "background-dark": "trello-canvas-dark",
      "surface-light": "trello-surface-light",
      "surface-dark": "trello-surface-dark",
      "text-primary-light": "trello-black",
      "text-primary-dark": "trello-white"
    },
    "typography": {
      "display": "heading",
      "prose": "body",
      "code": "mono"
    }
  },
  "assets": [],
  "rules": [
    {
      "type": "colorChoice",
      "target": "logo.mark",
      "severity": "error",
      "rationale": "The Trello mark renders in Trello Blue on light surfaces and in white on dark surfaces. Recoloring the mark into off- brand hues violates Atlassian's brand-use guidance for Trello.\n",
      "allowed": [
        "trello-blue",
        "trello-white",
        "trello-black"
      ],
      "forbidden": [
        "any-non-brand-color"
      ]
    },
    {
      "type": "forbiddenTreatment",
      "target": "logo",
      "severity": "error",
      "rationale": "Atlassian's brand resources prohibit stretching, rotating, recoloring, or applying decorative effects to portfolio marks, including Trello.\n",
      "treatments": [
        "stretched",
        "rotated",
        "recolored",
        "drop-shadow",
        "on-busy-photo",
        "gradient-fill"
      ]
    },
    {
      "type": "contrastRatio",
      "target": "text-primary",
      "severity": "error",
      "rationale": "WCAG 2.1 Level AA contrast minimum for body text. Trello Black (#172B4D) on Trello White (#FFFFFF) clears AA comfortably.\n",
      "against": "background",
      "minRatio": 4.5,
      "standard": "WCAG-AA"
    },
    {
      "type": "variantSelection",
      "target": "logo",
      "severity": "error",
      "rationale": "On dark surfaces, use Trello's documented light-fill mark variant; do not invert the blue mark on the fly.\n",
      "when": {
        "backgroundColorScheme": "dark"
      },
      "use": "logo-light"
    },
    {
      "type": "contextRestriction",
      "target": "roles.colors.identity",
      "severity": "error",
      "rationale": "Atlassian's trademark guidance forbids use of the Trello name and mark in third-party company names, domains, and uses that imply affiliation or endorsement.\n",
      "forbiddenContexts": [
        "product-of-competitor",
        "merchandise",
        "endorsement-implication",
        "company-name-or-domain"
      ]
    },
    {
      "type": "compositionConstraint",
      "target": "roles.colors.identity",
      "severity": "recommendation",
      "rationale": "Trello Blue is calibrated to read on white and on Atlassian's documented near-black. Pairing it with another saturated hue at the same weight breaks the focused, board-anchored voice of the brand surface.\n",
      "pairsWith": [
        "trello-white",
        "trello-black",
        "trello-surface-light"
      ]
    },
    {
      "type": "enumMembership",
      "target": "typography.heading.fontWeight",
      "severity": "warning",
      "rationale": "Trello's marketing and product surfaces render headings in the 500–700 band, consistent with Atlassian Design; lighter weights undermine the confident voice of the brand.\n",
      "allowed": [
        "500",
        "600",
        "700"
      ]
    },
    {
      "type": "accessibilityRequirement",
      "target": "*",
      "severity": "error",
      "rationale": "WCAG 2.1 Success Criterion 1.4.3 (Contrast Minimum) — Level AA. Trello-skinned surfaces must clear AA on body text, in line with Atlassian Design's accessibility floor.\n",
      "standard": "WCAG-AA",
      "criterion": "1.4.3"
    }
  ]
}