Loom UI Skills

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

When to Apply

Reference these guidelines when:

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

Colors

• SHOULD use light backgrounds for primary surfaces
• MUST use #E4EDFE as page background (surface-base)
• MUST use #2256C7 for primary actions and focus states (accent)
• SHOULD reduce color palette (currently 14 colors detected)
• MUST maintain text contrast ratio of at least 4.5:1 for accessibility

Semantic Tokens

Token	HEX	RGB	Usage
surface-base	#E4EDFE	rgb(228,237,254)	Page background
surface-raised	#FFFFFF	rgb(255,255,255)	Cards, modals, raised surfaces
surface-overlay	#171718	rgb(23,23,24)	Overlays, tooltips, dropdowns
text-primary	#B6B6B7	rgb(182,182,183)	Headings, body text
text-2	#363B43	rgb(54,59,67)	Additional text
text-secondary	#B1CFEF	rgb(177,207,239)	Secondary, muted text
border-default	#E8EEF8	rgb(232,238,248)	Subtle borders, dividers
accent	#2256C7	rgb(34,86,199)	Primary actions, links, focus

Typography

• MUST use Inter as primary font family
• SHOULD use single font family for consistency
• MUST use 54px / 700 for primary headings
• MUST use 25px / 500 for body text
• MUST limit font weights to: medium, bold, regular
• 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	54px	700	#1D1D1F	1
body	Inter	25px	500	#3C3C3C	1
text-20px	Inter	20px	500	#333433	1
text-16px	Inter	16px	400	#656565	1
text-16px	Inter	16px	400	#626262	1
text-16px	Inter	16px	400	#676767	1
text-15px	Inter	15px	400	#666666	1
caption	Inter	13px	500	#B6B6B7	1
label	Inter	13px	400	#4A505C	1
label	Inter	12px	400	#B1CFEF	1

Typography Reference

Font Families:

• Inter (used 15x)

Font Sizes: 11px, 12px, 13px, 15px, 16px, 20px, 25px, 54px

Spacing

• MUST use 4px grid for spacing
• SHOULD use spacing from scale: 4px, 5px, 6px, 7px, 9px, 10px, 13px, 14px
• 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: 4px, 15px, 18px, 22px, 26px, 28px
• SHOULD use 22px+ radius for pill-shaped elements
• SHOULD limit border widths to: 1px, 2px
• SHOULD use 28px 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: 4px, 15px, 18px, 22px, 26px, 28px

Layout

• MUST design for 1920px base viewport width
• SHOULD use consistent element widths: 137px, 144px, 6px
• 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

Components

Buttons

Variant	Background	Text	Border	Height	Radius
Ghost	transparent	#B6B6B7	none	-	-

Interactive States

Focus

• MUST use 2px outline with accent color (#2256C7)
• MUST use 2px outline-offset
• NEVER remove focus indicators

Hover

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