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