Notion UI Skills

Opinionated constraints for building Notion-style interfaces with AI agents.

When to Apply

Reference these guidelines when:

• Building light-mode interfaces
• Creating Notion-inspired design systems
• Implementing UIs with Inter font and 4px grid

Colors

• SHOULD use light backgrounds for primary surfaces
• MUST use #F6F6F6 as page background (surface-base)
• MUST use #97CAEE for primary actions and focus states (accent)
• SHOULD reduce color palette (currently 15 colors detected)
• MUST maintain text contrast ratio of at least 4.5:1 for accessibility

Semantic Tokens

Token	HEX	RGB	Usage
surface-base	#F6F6F6	rgb(246,246,246)	Page background
surface-raised	#E5E5E4	rgb(229,229,228)	Cards, modals, raised surfaces
surface-overlay	#DFEFFE	rgb(223,239,254)	Overlays, tooltips, dropdowns
text-primary	#5D686A	rgb(93,104,106)	Headings, body text
text-2	#3E3E3E	rgb(62,62,62)	Additional text
text-tertiary	#505050	rgb(80,80,80)	Additional text
border-default	#EDEEEC	rgb(237,238,236)	Subtle borders, dividers
accent	#97CAEE	rgb(151,202,238)	Primary actions, links, focus

Typography

• MUST use Inter as primary font family
• SHOULD use single font family for consistency
• MUST use 66px / 700 for primary headings
• MUST use 16px / 500 for body text
• SHOULD reduce font weights (currently 6 detected)
• 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	66px	700	#212121	1
text-29px	Inter	29px	extra_bold	#292929	1
text-27px	Inter	27px	400	#4D4D4D	1
text-21px	Inter	21px	500	#252525	1
text-19px	Inter	19px	semi_bold	#333333	1
text-18px	Inter	18px	semi_bold	#383838	1
text-18px	Inter	18px	400	#4E4E4E	1
body	Inter	16px	500	#545454	1
body-secondary	Inter	16px	400	#9B9B9B	1
body-secondary	Inter	15px	400	#5F5F5F	2

Typography Reference

Font Families:

• Inter (used 33x)

Font Sizes: 8px, 10px, 11px, 12px, 13px, 14px, 15px, 16px, 18px, 19px, 21px, 27px, 29px, 66px

Spacing

• MUST use 4px grid for spacing
• SHOULD use spacing from scale: 1px, 2px, 4px, 5px, 6px, 11px, 14px, 18px
• SHOULD use 1px 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: 3px, 4px, 6px, 15px
• MUST use 1px border width consistently
• SHOULD use 4px 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: 3px, 4px, 6px, 15px

Layout

• MUST design for 1920px base viewport width
• SHOULD use consistent element widths: 16px, 13px, 17px, 18px, 10px
• SHOULD maintain text-heavy layout with clear hierarchy
• 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: 1080px
• Main Content: width: 1822px, height: 1008px

Components

• MUST use 0px height for input fields

Buttons

Variant	Background	Text	Border	Height	Radius
Ghost	transparent	#767674	none	-	-

Inputs

• Height: 0px

Interactive States

Focus

• MUST use 2px outline with accent color (#97CAEE)
• MUST use 2px outline-offset
• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%
• Buttons (secondary): use #E5E5E4 background
• List items: use #E5E5E4 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