Jasper UI Skills

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

When to Apply

Reference these guidelines when:

• Building light-mode interfaces

• Creating Jasper-inspired design systems

• Implementing UIs with Inter font and 4px grid

Colors

• SHOULD use light backgrounds for primary surfaces

• MUST use #F5261E as page background (surface-base )

• MUST use #6899D0 for primary actions and focus states (accent )

• SHOULD reduce color palette (currently 13 colors detected)

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

Semantic Tokens

Token HEX RGB Usage

surface-base

#F5261E rgb(245,38,30) Page background

surface-raised

#FFFFFF rgb(255,255,255) Cards, modals, raised surfaces

surface-overlay

#EEEFEE rgb(238,239,238) Overlays, tooltips, dropdowns

text-primary

#6899D0 rgb(104,153,208) Headings, body text

text-secondary

#69B0F9 rgb(105,176,249) Secondary, muted text

text-tertiary

#282945 rgb(40,41,69) Additional text

border-default

#E8E3F4 rgb(232,227,244) Subtle borders, dividers

accent

#6899D0 rgb(104,153,208) Primary actions, links, focus

destructive

#F5261E rgb(245,38,30) Error states, delete actions

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 91px / 700 for primary headings

• MUST use 40px / 700 for body text

• MUST limit font weights to: regular, medium, bold

• 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 91px 700 #69B0F9 1

text-79px

Inter 79px 700 #191B3D 1

body

Inter 40px 700 #282945 1

text-37px

Inter 37px 700 #E24843 1

text-23px

Inter 23px 400 #4E4F61 1

text-17px

Inter 17px 500 #6899D0 1

text-16px

Inter 16px 700 #F9A79D 1

text-15px

Inter 15px 400 #F2A496 1

text-14px

Inter 14px 400 #F2A095 1

text-14px

Inter 14px 400 #424253 1

Typography Reference

Font Families:

• Inter (used 20x)

Font Sizes: 10px, 11px, 12px, 13px, 14px, 15px, 16px, 17px, 23px, 37px, 40px, 79px, 91px

Spacing

• MUST use 4px grid for spacing

• SHOULD use spacing from scale: 1px, 2px, 3px, 4px, 5px, 6px, 8px, 9px

• 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

• MUST use 1px border width consistently

• SHOULD use 4px 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

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 141px, 91px, 101px

• 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: 1001px

• Main Content: width: 1920px, height: 1037px

Components

• MUST use 0px height for input fields

Buttons

Variant Background Text Border Height Radius

Ghost transparent #282945 none

Inputs

• Height: 0px

Interactive States

Focus

• MUST use 2px outline with accent color (#6899D0 )

• 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