token-lookup

Find the matching Fluent UI design token for a hardcoded CSS value (color, spacing, font size, border radius, shadow)

npx skills add https://github.com/microsoft/fluentui --skill token-lookup

Design Token Lookup

Find the correct @fluentui/react-theme design token for the hardcoded value $ARGUMENTS.

Steps

  1. Identify the value category:

    • Hex color / rgb / named color → color tokens
    • px/rem spacing → spacing tokens
    • px/rem font size → font size tokens
    • px/rem border radius → border radius tokens
    • Font weight (400, 600, bold) → font weight tokens
    • Box shadow → shadow tokens
    • Border width → stroke width tokens
    • Duration (ms/s) → duration tokens
  2. Search the theme source for matching values:

    packages/react-components/react-theme/library/src/
    

    Look in the relevant theme files (e.g., colorPalette*.ts, global/, alias/) to find tokens that map to the given value.

  3. Return the token name and usage:

    // Instead of: color: '#0078d4'
    // Use:
    import { tokens } from '@fluentui/react-theme';
    color: tokens.colorBrandBackground;
    
  4. If no exact match exists, suggest the closest semantic token and explain the difference. Refer to docs/architecture/design-tokens.md for token categories.

Common Mappings

HardcodedToken
#0078d4tokens.colorBrandBackground
#323130tokens.colorNeutralForeground1
#fffffftokens.colorNeutralBackground1
4px border-radiustokens.borderRadiusMedium
8px paddingtokens.spacingHorizontalS or tokens.spacingVerticalS
14px font-sizetokens.fontSizeBase300
600 font-weighttokens.fontWeightSemibold

These are approximate — always verify against the actual theme source.

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