tldraw-ui-skills
Tldraw's UI design system. Use when building interfaces inspired by Tldraw's aesthetic - light mode, Inter font, 4px grid.
What this skill does
# Tldraw UI Skills Opinionated constraints for building Tldraw-style interfaces with AI agents. ## When to Apply Reference these guidelines when: - Building light-mode interfaces - Creating Tldraw-inspired design systems - Implementing UIs with Inter font and 4px grid ## Colors - SHOULD use light backgrounds for primary surfaces - MUST use `#E7EBEE` as page background (`surface-base`) - MUST use `#0E54F0` for primary actions and focus states (`accent`) - SHOULD limit color palette to 9 distinct colors - MUST maintain text contrast ratio of at least 4.5:1 for accessibility ### Semantic Tokens | Token | HEX | RGB | Usage | |-------|-----|-----|-------| | `surface-base` | #E7EBEE | rgb(231,235,238) | Page background | | `surface-raised` | #F8F9FB | rgb(248,249,251) | Cards, modals, raised surfaces | | `surface-overlay` | #0E54F0 | rgb(14,84,240) | Overlays, tooltips, dropdowns | | `text-primary` | #A3A4A6 | rgb(163,164,166) | Headings, body text | | `text-secondary` | #64686B | rgb(100,104,107) | Secondary, muted text | | `text-tertiary` | #535353 | rgb(83,83,83) | Additional text | | `border-default` | #CBCCCE | rgb(203,204,206) | Subtle borders, dividers | | `accent` | #0E54F0 | rgb(14,84,240) | Primary actions, links, focus | ## Typography - MUST use `Inter` as primary font family - SHOULD use single font family for consistency - MUST use `14px` / `500` for primary headings - MUST use `12px` / `400` for body text - MUST limit font weights to: regular, medium - MUST use `text-balance` for headings and `text-pretty` for body text - SHOULD use `tabular-nums` for numeric data - NEVER modify letter-spacing unless explicitly requested ### Text Styles | Style | Font | Size | Weight | Color | Count | |-------|------|------|--------|-------|-------| | `heading-1` | Inter | 14px | 500 | #5C5C5C | 1 | | `heading-2` | Inter | 13px | 500 | #4E4F51 | 1 | | `heading-3` | Inter | 12px | 500 | #6A6A6A | 1 | | `body` | Inter | 12px | 400 | #535353 | 1 | | `body-secondary` | Inter | 12px | 400 | #616161 | 1 | | `body-secondary` | Inter | 12px | 400 | #96C4F4 | 1 | | `text-10px` | Inter | 10px | 400 | #A3A4A6 | 1 | | `caption` | Inter | 9px | 400 | #64686B | 1 | | `label` | Inter | 7px | 400 | #A6A7A9 | 1 | ### Typography Reference **Font Families:** - `Inter` (used 9x) **Font Sizes:** 7px, 9px, 10px, 12px, 13px, 14px ## Spacing - MUST use 4px grid for spacing - SHOULD use spacing from scale: 1px, 2px, 3px, 4px, 5px, 6px, 18px, 22px - SHOULD use 2px as default gap between elements - NEVER use arbitrary spacing values (use design scale) - SHOULD maintain consistent padding within containers ## Borders - MUST use border-radius from scale: 0px, 3px, 4px, 6px, 7px, 9px - MUST use 1px border width consistently - SHOULD use 6px as default border-radius - NEVER use arbitrary border-radius values (use design scale) - SHOULD use subtle borders (1px) for element separation ### Border Radius Reference **Scale:** 0px, 3px, 4px, 6px, 7px, 9px ## Layout - MUST design for 1920px base viewport width - SHOULD use consistent element widths: 16px, 12px, 96px, 13px, 32px - NEVER use `h-screen`, use `h-dvh` for full viewport height - MUST respect `safe-area-inset` for fixed elements - SHOULD use `size-*` for square elements instead of `w-*` + `h-*` ### Detected Layout Patterns - **Main Content**: width: 1920px, height: 965px - **Main Content**: width: 1920px, height: 593px ## Components ### Buttons | Variant | Background | Text | Border | Height | Radius | |---------|------------|------|--------|--------|--------| | Ghost | transparent | #A3A4A6 | none | - | - | ## Interactive States ### Focus - MUST use `2px` outline with accent color (`#0E54F0`) - MUST use `2px` outline-offset - NEVER remove focus indicators ### Hover - Buttons (primary): lighten background by 10% - Buttons (secondary): use `#F8F9FB` background - List items: use `#F8F9FB` background ### Disabled - MUST use `opacity: 0.5` - MUST use `cursor: not-allowed` ## Interaction - MUST use an `AlertDialog` for destructive or irreversible actions - SHOULD use structural skeletons for loading states - MUST show errors next to where the action happens - NEVER block paste in `input` or `textarea` elements - MUST add an `aria-label` to icon-only buttons ## Animation - NEVER add animation unless it is explicitly requested - MUST animate only compositor props (`transform`, `opacity`) - NEVER animate layout properties (`width`, `height`, `top`, `left`, `margin`, `padding`) - SHOULD use `ease-out` on entrance animations - NEVER exceed `200ms` for interaction feedback - SHOULD respect `prefers-reduced-motion` ## Performance - NEVER animate large `blur()` or `backdrop-filter` surfaces - NEVER apply `will-change` outside an active animation - NEVER use `useEffect` for anything that can be expressed as render logic
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