Convex UI Skills

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

When to Apply

Reference these guidelines when:

• Building dark-mode interfaces

• Creating Convex-inspired design systems

• Implementing UIs with Inter font and 4px grid

Colors

• MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 6

• MUST use #0F0F0F as page background (surface-base )

• MUST use #214AE8 for primary actions and focus states (accent )

• SHOULD reduce color palette (currently 31 colors detected)

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

Semantic Tokens

Token HEX RGB Usage

surface-base

#0F0F0F rgb(15,15,15) Page background

surface-raised

#262523 rgb(38,37,35) Cards, modals, raised surfaces

surface-overlay

#F2EAD3 rgb(242,234,211) Overlays, tooltips, dropdowns

text-primary

#676151 rgb(103,97,81) Headings, body text

text-secondary

#403D37 rgb(64,61,55) Secondary, muted text

text-tertiary

#515151 rgb(81,81,81) Additional text

border-default

#3A3934 rgb(58,57,52) Subtle borders, dividers

accent

#214AE8 rgb(33,74,232) Primary actions, links, focus

destructive

#4F3727 rgb(79,55,39) Error states, delete actions

warning

#F2EAD3 rgb(242,234,211) Warning states, cautions

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 40px / semi_bold for primary headings

• MUST use 21px / 400 for body text

• SHOULD reduce font weights (currently 5 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 40px semi_bold #DDDDD7 1

text-31px

Inter 31px 700 #403D37 1

body

Inter 21px 400 #676151 1

body-secondary

Inter 20px 700 #EBEBE7 1

text-18px

Inter 18px 400 #B4B4AC 1

text-18px

Inter 18px 500 #CBCBC3 1

text-15px

Inter 15px 400 #5B5B5B 1

text-15px

Inter 15px 400 #B5B5AD 1

text-14px

Inter 14px 500 #5B5B5B 1

text-14px

Inter 14px 400 #5D5D5D 1

Typography Reference

Font Families:

• Inter (used 95x)

Font Sizes: 4px, 6px, 7px, 8px, 9px, 10px, 11px, 12px, 13px, 14px, 15px, 18px, 20px, 21px, 31px, 40px

Spacing

• MUST use 4px grid for spacing

• SHOULD use spacing from scale: 1px, 2px, 3px, 4px, 5px, 6px, 7px, 8px

• 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, 4px, 6px, 7px, 10px, 13px, 15px, 18px, 21px, 50px, 54px

• SHOULD use 21px+ radius for pill-shaped elements

• SHOULD limit border widths to: 1px, 2px

• SHOULD use 3px 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, 4px, 6px, 7px, 10px, 13px, 15px, 18px, 21px, 50px, 54px

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 12px, 7px, 8px, 2px, 24px

• 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: 1777px, height: 831px

• Main Content: width: 1513px, height: 852px

Components

Buttons

Variant Background Text Border Height Radius

Ghost transparent #5C5646 none

Interactive States

Focus

• MUST use 2px outline with accent color (#214AE8 )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #262523 background

• List items: use #262523 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