Robinhood UI Skills

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

When to Apply

Reference these guidelines when:

• Building dark-mode interfaces

• Creating Robinhood-inspired design systems

• Implementing UIs with Inter font and 4px grid

Colors

• MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 0

• MUST use #000000 as page background (surface-base )

• MUST use #B7DF2F for primary actions and focus states (accent )

• SHOULD limit color palette to 10 distinct colors

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

Semantic Tokens

Token HEX RGB Usage

surface-base

#000000 rgb(0,0,0) Page background

surface-raised

#C3FE09 rgb(195,254,9) Cards, modals, raised surfaces

text-primary

#A0A0A0 rgb(160,160,160) Headings, body text

text-2

#ECECEC rgb(236,236,236) Additional text

text-secondary

#497009 rgb(73,112,9) Secondary, muted text

border-default

#B7DF2F rgb(183,223,47) Subtle borders, dividers

accent

#B7DF2F rgb(183,223,47) Primary actions, links, focus

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 85px / 700 for primary headings

• MUST use 14px / 400 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 85px 700 #ECECEC 1

text-18px

Inter 18px 500 #D9D9D9 1

text-17px

Inter 17px 400 #A0A0A0 1

body

Inter 14px 400 #A1A1A1 2

body-secondary

Inter 14px 400 #497009 1

body-secondary

Inter 14px 400 #899C47 1

body-secondary

Inter 14px 400 #A0A0A0 1

caption

Inter 11px 400 #A2A2A2 2

label

Inter 11px 300 #909090 1

label

Inter 11px 400 #A1A1A1 1

Typography Reference

Font Families:

• Inter (used 13x)

Font Sizes: 11px, 14px, 17px, 18px, 85px

Spacing

• MUST use 4px grid for spacing

• SHOULD use spacing from scale: 4px, 5px, 6px, 12px, 13px, 14px, 17px, 19px

• SHOULD use 4px 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: 19px, 21px

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

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

• SHOULD use 21px 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: 19px, 21px

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 12px, 74px

• 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: 1016px

• Header: height: 64px

• Main Content: width: 1920px, height: 608px

• Main Content: width: 1920px, height: 1001px

• Header: height: 63px

Components

Buttons

Variant Background Text Border Height Radius

Ghost transparent #497009 none

Interactive States

Focus

• MUST use 2px outline with accent color (#B7DF2F )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #C3FE09 background

• List items: use #C3FE09 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