N26 UI Skills

Opinionated constraints for building N26-style interfaces with AI agents.

When to Apply

Reference these guidelines when:

• Building dark-mode interfaces

• Creating N26-inspired design systems

• Implementing UIs with Inter font and 4px grid

Colors

• MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 0

• MUST use #000000 as page background (surface-base )

• MUST use #116F64 for primary actions and focus states (accent )

• SHOULD reduce color palette (currently 18 colors detected)

• MUST maintain text contrast ratio of at least 4.5:1 for accessibility

Semantic Tokens

Token HEX RGB Usage

surface-base

#000000 rgb(0,0,0) Page background

surface-raised

#929493 rgb(146,148,147) Cards, modals, raised surfaces

surface-overlay

#E0E0E0 rgb(224,224,224) Overlays, tooltips, dropdowns

text-primary

#555555 rgb(85,85,85) Headings, body text

text-secondary

#436960 rgb(67,105,96) Secondary, muted text

text-tertiary

#588378 rgb(88,131,120) Additional text

border-default

#D3D3D3 rgb(211,211,211) Subtle borders, dividers

accent

#116F64 rgb(17,111,100) Primary actions, links, focus

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 46px / extra_bold for primary headings

• MUST use 27px / 500 for body text

• SHOULD reduce font weights (currently 4 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 46px extra_bold #D9DBD7 1

text-32px

Inter 32px 500 #393939 1

body

Inter 27px 500 #A09D98 1

text-23px

Inter 23px 500 #545454 1

text-14px

Inter 14px 400 #5A8C83 1

text-13px

Inter 13px 400 #616161 1

text-13px

Inter 13px 400 #595959 1

text-12px

Inter 12px 300 #7C7C7C 1

text-12px

Inter 12px 400 #9FD4D0 1

text-11px

Inter 11px 400 #555555 1

Typography Reference

Font Families:

• Inter (used 36x)

Font Sizes: 7px, 8px, 9px, 10px, 11px, 12px, 13px, 14px, 23px, 27px, 32px, 46px

Spacing

• MUST use 4px grid for spacing

• SHOULD use spacing from scale: 2px, 3px, 5px, 6px, 7px, 8px, 25px, 35px

• SHOULD use 5px 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: 1px, 3px, 5px

• MUST use 1px border width consistently

• SHOULD use 5px 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: 1px, 3px, 5px

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 35px, 41px, 54px, 15px, 14px

• 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

• Header: height: 72px

• Main Content: width: 1920px, height: 1009px

Components

Buttons

Variant Background Text Border Height Radius

Ghost transparent #436960 none

Interactive States

Focus

• MUST use 2px outline with accent color (#116F64 )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #929493 background

• List items: use #929493 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