Bolt design system

What font does Bolt use?

Bolt’s website uses Inter for headings and body text. Inter is free on Google Fonts.

Bolt colour palette

Bolt’s home page is dark (#111114 background, #FFFFFF text) and uses #2BA6FF for its main actions. Its palette: #111114, #171719, #000000, #1E1E21, #F9F6F9, #A4A3AC.

• #111114
  71% · backgrounds
• #171719
  15.9% · backgrounds
• #000000
  5.5% · backgrounds
• #1E1E21
  3.6% · backgrounds
• #F9F6F9
  0.9% · text
• #A4A3AC
  0.8% · backgrounds, text
• #FFFFFF
  0.7% · text, lines
• #D6D5DE
  0.6% · text
• #050507
  0.4% · backgrounds
• #F5F5F5
  0.1% · text

Type scale

Each size the page sets text in, with its weight and line height. Bolt’s largest type is 96px at weight 600.

Spacing and shape

Spacing sits on a 4px grid: 4px, 8px, 12px, 16px, 20px, 24px, 28px, 32px, 36px, 40px, 48px, 64px.

Corner radii: 1px, 2px, 4px, 6px, 12px, 16px, 24px, pill. 3 shadow levels measured.

What makes Bolt look like Bolt

Almost entirely neutral: 99% of the page is painted in #111114 and #171719.

#2BA6FF is an accent: under 0.1% of the page, as small fills such as buttons and badges. Keep it to small areas.

#1488FC is an accent: under 0.1% of the page, as small fills such as buttons and badges. Keep it to small areas.

The largest type (96px Inter) is semibold (600).

Bolt DESIGN.md for Claude Code, Cursor and Lovable

A DESIGN.md is the brief an AI coding tool reads before it writes UI. This one carries everything on this page as rules a model follows: the allowed colours and what each is for, the fonts with free stand-ins, the type scale, spacing, corners, and the things Bolt’s design never does.

Put it in your project root and ask your tool to follow it: “Read DESIGN.md and build [your product] in this design language.” It describes a style, not Bolt’s product, so use your own name, words and images.

Download Bolt DESIGN.md · View it as text

As CSS variables

The measured values as CSS custom properties, with free fonts standing in for licensed ones. Use them to learn from or to start a project in a similar style; Bolt’s name, logo, words and images are theirs.

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Archivo:wght@600;700&display=swap");

:root {
  --color-background: #111114; /* Background */
  --color-surface: #1E1E21; /* Surface */
  --color-text: #FFFFFF; /* Text */
  --color-text-muted: #A4A3AC; /* Text muted */
  --color-border: #3C3C41; /* Border */
  --color-action: #2BA6FF; /* Action */
  --color-on-action: #000000; /* On action */
  --color-positive: #84CC16; /* Positive */
  --color-171719: #171719; /* 15.9% of the page, as fills */
  --color-050507: #050507; /* 0.4% of the page, as fills */
  --font-body: "Inter", sans-serif; /* Inter */
  --font-interface: "Inter Display", "Archivo", sans-serif; /* Inter Display on the site; Archivo renders */
  --type-display-large: 96px; /* Display Large, weight 600 */
  --type-display-large-leading: 96px;
  --type-display-medium: 48px; /* Display Medium, weight 700 */
  --type-display-medium-leading: 48px;
  --type-display-medium-tracking: -0.025em;
  --type-display-small: 36px; /* Display Small, weight 700 */
  --type-display-small-leading: 40px;
  --type-display-small-tracking: -0.025em;
  --type-headline-large: 30px; /* Headline Large, weight 600 */
  --type-headline-large-leading: 36px;
  --type-headline-small: 24px; /* Headline Small, weight 600 */
  --type-headline-small-leading: 32px;
  --type-title-large: 20px; /* Title Large, weight 600 */
  --type-title-large-leading: 28px;
  --type-title-small: 18px; /* Title Small, weight 400 */
  --type-title-small-leading: 28px;
  --type-body-large: 16px; /* Body Large, weight 400 */
  --type-body-large-leading: 24px;
  --type-body-small: 14px; /* Body Small, weight 400 */
  --type-body-small-leading: 20px;
  --type-label-large: 12px; /* Label Large, weight 500 */
  --type-label-large-leading: 16px;
  --type-label-small: 11px; /* Label Small, weight 400 */
  --type-label-small-leading: 16.5px;
  --type-label-small-tracking: 0.136em;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-9: 36px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-18: 72px;
  --space-20: 80px;
  --space-23: 92px;
  --space-24: 96px;
  --space-25: 100px;
  --space-30: 120px;
  --space-36: 144px;
  --space-39: 156px;
  --space-48: 192px;
  --radius-xs: 1px;

How this was measured

PikSpec’s scanner read the bolt.new home page in Chrome at 1440px wide on 15 October 2026: the computed styles of its elements, the fonts that rendered and how much of the page each colour covers. Websites change; capture the page yourself with PikSpec for today’s values, any page, and exports in five formats.

Bolt is a trademark of its owner. This page is an independent measurement and is not affiliated with or endorsed by Bolt.

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