Miro UI Skills

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

When to Apply

Reference these guidelines when:

• Building light-mode interfaces

• Creating Miro-inspired design systems

• Implementing UIs with Inter font and 4px grid

Colors

• SHOULD use light backgrounds for primary surfaces

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

• MUST use #C2BBFE for primary actions and focus states (accent )

• SHOULD reduce color palette (currently 39 colors detected)

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

Semantic Tokens

Token HEX RGB Usage

surface-base

#FEFEFE rgb(254,254,254) Page background

surface-raised

#000000 rgb(0,0,0) Cards, modals, raised surfaces

surface-overlay

#EBE4F6 rgb(235,228,246) Overlays, tooltips, dropdowns

text-primary

#4D4E4F rgb(77,78,79) Headings, body text

text-secondary

#4A68AA rgb(74,104,170) Secondary, muted text

text-tertiary

#666666 rgb(102,102,102) Additional text

border-default

#F1F1F2 rgb(241,241,242) Subtle borders, dividers

accent

#C2BBFE rgb(194,187,254) Primary actions, links, focus

warning

#4F4826 rgb(79,72,38) Warning states, cautions

destructive

#E5802A rgb(229,128,42) Error states, delete actions

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 47px / 700 for primary headings

• MUST use 7px / 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 47px 700 #373737 1

text-37px

Inter 37px 700 #383839 1

text-23px

Inter 23px semi_bold #292929 1

text-22px

Inter 22px 400 #717378 1

text-17px

Inter 17px 400 #B0B0B2 1

text-16px

Inter 16px 400 #4A68AA 1

text-16px

Inter 16px 400 #5A5A5A 1

text-15px

Inter 15px 400 #4D4E4F 1

text-15px

Inter 15px 400 #B6C3F8 1

text-14px

Inter 14px 400 #525252 1

Typography Reference

Font Families:

• Inter (used 74x)

Font Sizes: 2px, 3px, 4px, 5px, 6px, 7px, 8px, 10px, 11px, 12px, 13px, 14px, 15px, 16px, 17px, 22px, 23px, 37px, 47px

Spacing

• MUST use 4px grid for spacing

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

• 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: 1px, 3px, 4px, 5px, 6px, 7px, 9px, 15px, 16px, 17px, 18px

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

• SHOULD use 1px 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, 5px, 6px, 7px, 9px, 15px, 16px, 17px, 18px

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 9px, 4px, 10px, 12px, 7px

• 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: 79px

• Main Content: width: 1920px, height: 929px

• Main Content: width: 1920px, height: 1003px

• Header: height: 80px

Components

Buttons

Variant Background Text Border Height Radius

Ghost transparent #4A68AA none

Interactive States

Focus

• MUST use 2px outline with accent color (#C2BBFE )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #000000 background

• List items: use #000000 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