Bolt — decoded design system

bolt.new · dark · modern · tailwind · deep decode — measured live

Bolt's design system, decoded live by Mozaika: measured color roles, type scale, buttons with real hover/focus states, motion and the brand's own tokens.

Open in Mozaika →

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

Decoded design system

Bolt's decoded design system: background #171719, text #FFFFFF, accent #2BA6FF, link #2BA6FF, primary #1488FC; type scale h1 96px / h2 48px / body 16px; 4px spacing base; 6px base radius. The single interactive/action color is #1488FC — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #1488FC — the single interactive color; only on things you click or must notice, never large fills.
• primary, button_bg are all #1488FC — one role, not several (the action color).
• accent, link are all #2BA6FF — one role, not several (the action color).
• accent #2BA6FF — accent for emphasis — keep it rare on the page.
• secondary #3D1B1E — 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: Inter Display
• Body: Inter
• h1: 96px
• h2: 48px
• body: 16px

Spacing

• base unit: 4px
• scale: 2px, 4px, 5px, 6px, 8px, 10px, 12px, 16px, 20px, 24px

Radii

• base: 6px
• button: 6px

Shadow

rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px

Shadows (elevation)

• subtle: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px
• card: rgb(255, 255, 255) 0px 0px 0px 0px, rgb(23, 23, 23) 0px 0px 0px 6px, rgba(0, 0, 0, 0) 0px 0px 0px 0px
• overlay: rgba(17, 114, 226, 0.6) 0px -15px 24.8px 0px

Motion

Micro-interactions run at 150ms (dominant) with cubic-bezier(0.4, 0, 0.2, 1).

• durations: 150ms · 250ms · 300ms
• easings: cubic-bezier(0.4, 0, 0.2, 1) · linear
• animated properties: color, background-color, border-color, opacity

Native design tokens

…and 92 more measured on the page.

Button states (measured)

• primary hover: background #2BA6FF
• primary focus: outline 2px auto rgb(43, 166, 255)

Layout (measured)

• container max-width: 1280px
• nav: 50px fixed, backdrop blur(17px)
• common grid: 2 columns

Motion choreography (measured)

Load order: div.relative×2 → div.relative×2 → div.relative

Responsive (measured)

• mobile (390px): hero 48px · nav inline

Install it

Drop this measured system into any shadcn/Tailwind project in one command:

npx shadcn add mozaika.design/r/decode/bolt.new

registry item · or query it over MCP: get_design_system("Bolt")

Export: DESIGN.md

# Bolt — Design System

> dark, modern, high, tailwind — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#171719` |
| surface | `#242426` |
| border | `#39393B` |
| text | `#FFFFFF` |
| text_muted | `#A6A6A7` |
| primary | `#1488FC` |
| accent | `#2BA6FF` |
| link | `#2BA6FF` |
| secondary | `#3D1B1E` |
| button_bg | `#1488FC` |
| button_text | `#F3F0F5` |

**Using these colors**

- **Action color** `#1488FC` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `primary`, `button_bg` are all `#1488FC` — one role, not several (your action color).
- `accent`, `link` are all `#2BA6FF` — one role, not several.
- **accent** `#2BA6FF` — accent for emphasis — keep it rare on the page.
- **secondary** `#3D1B1E` — 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.
- **Page coverage** (full-page screenshot pixels): `#111114` 77.9% · `#142941` 14.3% · `#81929E` 7.8%

## Typography

- Heading: **Inter Display**
- Body: **Inter**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 96px / 600 · lh 96px |
| h2 | 48px / 700 · lh 48px · tracking -1.2px |
| h3 | 36px / 700 · lh 40px · tracking -0.9px |
| body | 16px / 400 · lh 24px |
| small | 14px / 400 · lh 20px |
| eyebrow | 12px / 600 · tracking 1.2px |

- Weight ladder: 400 · 500 · 600 · 700 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** Inter Display — free, on Google. Inter — free, on Google.

## Spacing
- base unit: 4px (inferred from the measured scale)
- measured scale: 2px, 4px, 5px, 6px, 8px, 10px, 12px, 16px, 20px, 24px — snap all gaps/padding to these
- section rhythm: 120px top/bottom padding per section (measured)

## Radius
- base: 6px
- button: 6px
- card: 12px
- pill: 9999px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#1488FC` / `#F3F0F5` | none | 6px | 0px 10px 0px 10px | 500 12px | rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px |
| secondary | `rgba(0, 0, 0, 0)` / `#FFFEFE` | 1px solid rgba(255, 255, 255, 0.1) | 6px | 0px 10px 0px 10px | 500 12px | rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px |

**States (measured, not guessed)**

- primary hover: background `#2BA6FF`
- primary focus: outline `2px auto rgb(43, 166, 255)`
- secondary hover: background `#171719`
- transition: `color 0.15s cubic-bezier(0.4, 0, 0.2, 1)`

## Shadows (elevation)
- subtle: `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px`
- card: `rgb(255, 255, 255) 0px 0px 0px 0px, rgb(23, 23, 23) 0px 0px 0px 6px, rgba(0, 0, 0, 0) 0px 0px 0px 0px`
- button: `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px`
- overlay: `rgba(17, 114, 226, 0.6) 0px -15px 24.8px 0px`

## Motion
- durations: 150ms (dominant) · 250ms · 300ms
- easings: `cubic-bezier(0.4, 0, 0.2, 1)` (dominant) · `linear`
- animated properties: color, background-color, border-color, opacity

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--bolt-ds-brandContainer` | `#2ba6ff1a` |
| `--bolt-ds-brandContainerSubtle` | `#2ba6ff1a` |
| `--bolt-ds-brandContainerHover` | `#2ba6ff33` |
| `--bolt-ds-brandOutline` | `#2ba6ff1a` |
| `--bolt-ds-utilHover` | `#FFFEFE0a` |
| `--bolt-ds-textSecondary` | `#ffffffbf` |
| `--bolt-ds-textTertiary` | `#ffffff99` |
| `--bolt-ds-iconSecondary` | `#ffffff80` |
| `--bolt-ds-borderOutline` | `#ffffff1a` |
| `--bolt-ds-borderColorActive` | `#2ba6ff` |
| `--bolt-ds-borderDivider` | `#ffffff26` |
| `--bolt-ds-borderPrimary` | `#2C2C30` |

_…and 90 more measured on the page._

Prefer these names when extending their system — it's the brand's actual vocabulary.

## Layout (measured)
- container max 1280px · common grid: 2-col
- nav: 50px fixed · backdrop blur(17px) · border-bottom 1px solid rgba(255, 255, 255, 0.1)

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 1788 | 1815 | 2 | 8 | 0/120 | — |
| 3603 | 1150 | 12 | 8 | 120/80 | — |
| 4753 | 1216 | 6 | 8 | 80/48 | — |

## Motion choreography (measured)
Load order: `div.relative`×2 @0ms → `div.relative`×2 @0ms → `div.relative` @0ms

Rebuild the timeline, not just the durations — order, delays and staggers above are the choreography.

## Components (measured)
- disabled: bg #2BA6FF · text #FFFFFF

## Responsive (measured)
- mobile (390px): hero 48px · body 16px · nav: inline

## How to apply
Paste the Tailwind `@theme` (or CSS variables) as your base, then build each
section to its spec — verify every color, radius, and font against these tokens.
Hover/focus states, shadows and motion timings above are measured from the live page — match them exactly, don't re-guess them.

← All decoded design systems

An automated reading of Bolt's publicly-visible CSS (colors, fonts, spacing, motion) — not affiliated with bolt.new. No screenshots stored. Removal requests: hello@mozaika.design.