Ashby UI Skills

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

When to Apply

Reference these guidelines when:

• Building dark-mode interfaces

• Creating Ashby-inspired design systems

• Implementing UIs with Inter font and 4px grid

Colors

• MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 9

• MUST use #0E1122 as page background (surface-base )

• SHOULD limit color palette to 8 distinct colors

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

Semantic Tokens

Token HEX RGB Usage

surface-base

#0E1122 rgb(14,17,34) Page background

surface-raised

#FEFEFE rgb(254,254,254) Cards, modals, raised surfaces

text-primary

#D6D9DD rgb(214,217,221) Headings, body text

text-secondary

#34384D rgb(52,56,77) Secondary, muted text

text-tertiary

#797979 rgb(121,121,121) Additional text

border-default

#818288 rgb(129,130,136) Subtle borders, dividers

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 28px / 700 for primary headings

• MUST use 24px / semi_bold 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 28px 700 #E6E8EB 1

heading-2

Inter 25px semi_bold #D1D3D8 1

heading-3

Inter 24px semi_bold #E2E5E9 1

body

Inter 24px semi_bold #E0E2E6 1

body-secondary

Inter 24px semi_bold #D7D9DD 1

text-19px

Inter 19px semi_bold #D6D9DD 1

text-19px

Inter 19px 400 #507A5D 1

text-16px

Inter 16px 400 #797979 1

text-15px

Inter 15px 400 #34384D 1

caption

Inter 14px 400 #313549 1

Typography Reference

Font Families:

• Inter (used 16x)

Font Sizes: 12px, 13px, 14px, 15px, 16px, 19px, 24px, 25px, 28px

Spacing

• MUST use 4px grid for spacing

• SHOULD use spacing from scale: 2px, 3px, 4px, 5px, 88px

• 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: 10px

• MUST use 4px border width consistently

• SHOULD use 10px 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: 10px

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 560px, 17px, 564px, 1px, 79px

• 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-*

Components

• MUST use 0px height for input fields

Inputs

• Height: 0px

Interactive States

Focus

• MUST use 2px outline with accent color (#5E6AD2 )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #FEFEFE background

• List items: use #FEFEFE 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