Biome — design system & UI screens

Dev Tools · 1 screen · 10 sections · https://biomejs.dev/

Bright, blue-accented dev-tool landing; a three-column Code / Output / Performance comparison table under a large grotesk headline. Formatter and linter positioned head-to-head against Prettier.

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This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/website/biome.

Decoded design system

Biome's decoded design system: background #FFFFFF, text #0A0A0B, accent #0065DA, link #0065DA, primary #0065DA; type scale h1 64px / h2 20px / body 16px; 4px spacing base; 3px base radius. The single interactive/action color is #0065DA — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#FFFFFF`
surface	`#F0F0F0`
border	`#DADADA`
text	`#0A0A0B`
text_muted	`#676767`
primary	`#0065DA`
accent	`#0065DA`
link	`#0065DA`
secondary	`#ABB2BF`
button_bg	`#0065DA`
button_text	`#FFFFFF`

Using these colors

Action color #0065DA — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link, button_bg are all #0065DA — one role, not several (the action color).
accent #0065DA — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
secondary #ABB2BF — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.

Typography

Heading: Arial
Body: Arial
Mono: ui-monospace
h1: 64px
h2: 20px
body: 16px

Spacing

base unit: 4px
scale: 4px, 6px, 8px, 10px, 12px, 13px, 15px, 16px, 19px, 24px

Radii

base: 3px
button: 5px

Shadows (elevation)

subtle: rgba(0, 0, 0, 0.06) 0px 1px 1px 0px, rgba(0, 0, 0, 0.06) 0px 2px 1px 0px

Motion

Micro-interactions run at 200ms (dominant) with cubic-bezier(0.25, 0.46, 0.45, 0.94).

durations: 200ms · 500ms · 100ms
easings: cubic-bezier(0.25, 0.46, 0.45, 0.94) · ease
animated properties: opacity, background, border-color, width

Native design tokens

Token	Value
`--sl-color-accent-low`	`#c2d9fa`
`--sl-color-accent`	`#0065da`
`--sl-color-accent-high`	`#093066`
`--sl-color-white`	`#17181c`
`--sl-color-gray-1`	`#24272f`
`--sl-color-gray-2`	`#353841`
`--sl-color-gray-3`	`#545861`
`--sl-color-gray-4`	`#888b96`
`--sl-color-gray-5`	`#c0c2c7`
`--sl-color-gray-6`	`#eceef2`

…and 110 more measured on the page.

Button states (measured)

primary focus: outline 1px auto rgb(16, 16, 16)

Layout (measured)

container max-width: 1080px
nav: 64px fixed
common grid: 2 columns

Overlay recipe (measured)

dialog panel: #ECEEF2 · radius 8px

Themes

dark counterpart: background #17181C, text #C0C2C7.

Responsive (measured)

mobile (390px): hero 29px · nav hamburger

Full design system, per-section tokens & DESIGN.md / Tailwind / CSS exports →

Screens

Biome - One Toolchain for Your Web Project