boat design system

---
version: alpha
name: boat
description: "Dark interface measured from boat.dev: Funnel Display type with Inter, indigo accents, flat surfaces and pill-shaped controls."
colors:
  background: "#263FA9"
  surface: "#263FA9"
  on-surface: "#E0E3F2"
  on-background: "#E0E3F2"
  on-surface-strong: "#FEFEFE"
  on-surface-variant: "#C2C9E6"
  on-surface-muted: "#060606"
  primary: "#263FA9"
  on-primary: "#FFFFFF"
  inverse-surface: "#F1F3F9"
  secondary: "#1E3180"
  tertiary: "#223998"
typography:
  headline-display:
    fontFamily: Funnel Display
    fontSize: 56px
    fontWeight: 500
    lineHeight: 1.14
    letterSpacing: -0.03em
  headline-lg:
    fontFamily: Funnel Display
    fontSize: 40px
    fontWeight: 400
    lineHeight: 1.2
    letterSpacing: -0.02em
  headline-md:
    fontFamily: Funnel Display
    fontSize: 24px
    fontWeight: 400
    lineHeight: 1.33
    letterSpacing: -0.02em
  body-md:
    fontFamily: Inter
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
  body-lg:
    fontFamily: Inter
    fontSize: 18px
    fontWeight: 400
    lineHeight: 1.56
  body-sm:
    fontFamily: Inter
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.43
  caption:
    fontFamily: Inter
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.67
  code:
    fontFamily: IBM Plex Mono
    fontSize: 13px
    fontWeight: 400
    lineHeight: 1.23
  headline-display-mobile:
    fontFamily: Funnel Display
    fontSize: 34px
    fontWeight: 500
    lineHeight: 1.18
    letterSpacing: -0.03em
  headline-lg-mobile:
    fontFamily: Funnel Display
    fontSize: 32px
    fontWeight: 400
    lineHeight: 1.13
    letterSpacing: -0.02em
rounded:
  full: 9999px
spacing:
  base: 4px
  xs: 4px
  sm: 8px
  md: 12px
  lg: 24px
  xl: 48px
  gutter: 8px
  section: 96px
  margin: 48px
  container: 1344px
components:
  button-primary:
    backgroundColor: "{colors.on-surface-strong}"
    textColor: "{colors.background}"
    typography: "{typography.body-md}"
    rounded: 0px
    padding: 0px 24px
    height: 48px
  button-primary-hover:
    backgroundColor: "{colors.on-surface}"
  button-outline:
    backgroundColor: "{colors.background}"
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.body-md}"
    rounded: 0px
    padding: 0px 24px
    height: 48px
  button-outline-hover:
    backgroundColor: "{colors.secondary}"
  button-secondary:
    backgroundColor: "{colors.secondary}"
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.body-sm}"
    rounded: 0px
    padding: 0px 12px
    height: 32px
  button-ghost:
    textColor: "{colors.on-surface-variant}"
    typography: "{typography.body-sm}"
    rounded: 0px
    padding: 0px 12px
  input-field:
    textColor: "{colors.on-surface-muted}"
    typography: "{typography.body-lg}"
    rounded: 0px
    padding: 0px
  link:
    textColor: "{colors.on-surface-variant}"
---

# boat Design System

## Overview

boat describes itself as: “Persistent Linux VMs for AI agents with SSH, Docker, and fast fork. Billed per second, free when stopped. 7-day free trial, then from $20/mo.” The interface is dark, built on **Indigo (#263FA9)** with **Pale Indigo (#E0E3F2)** text, and **Indigo (#263FA9)** as the main accent.

Type is set in **Funnel Display** and **Inter**, with **IBM Plex Mono** for code. Headlines run large with tight negative tracking; body text is 16px. Depth comes from hairline borders and inset highlights rather than drop shadows. Controls are pill-shaped.

Measured from [boat.dev](https://boat.dev/) on October 23, 2026 at 1440×900 and 390×844 from 276 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 10 roles.

- **Indigo (#263FA9):** Page background, seen 16 times. Token `background`, CSS `--p14`.
- **Pale Indigo (#E0E3F2):** Primary text and headings, seen 19 times. Token `on-surface`, CSS `--p4`.
- **White (#FEFEFE):** Headings and emphasis, seen 18 times. Token `on-surface-strong`, CSS `--n-1`.
- **Light Indigo (#C2C9E6):** Secondary text, seen 9 times. Token `on-surface-variant`, CSS `--p6`.
- **Near Black (#060606):** Muted text and metadata, seen 71 times. Token `on-surface-muted`, CSS `--deep`.
- **Indigo (#263FA9):** Brand color on large areas, seen 27 times. Token `primary`, CSS `--p14`.
- **White (#FFFFFF):** Text and icons on primary. Token `on-primary`.
- **Cool Snow (#F1F3F9):** High-contrast fills, seen 18 times. Token `inverse-surface`, CSS `--p2`.
- **Dark Indigo (#1E3180):** Brand color in logos and imagery, seen 116 times. Token `secondary`, CSS `--blue-8`.
- **Dark Indigo (#223998):** Brand color in logos and imagery, seen 21 times. Token `tertiary`.

## Typography

**Funnel Display**, **Inter** and **IBM Plex Mono** (monospace) share the interface. Fallback stack: `Funnel Display, Funnel Display Fallback, Funnel Display, system-ui`. Other loaded fonts: Plex Art.

- **headline-display:** Funnel Display 56px at weight 500, line height 1.14, tracking -0.03em (34px on mobile). Page title (h1).
- **headline-lg:** Funnel Display 40px at weight 400, line height 1.2, tracking -0.02em (32px on mobile). Section headings (h2).
- **headline-md:** Funnel Display 24px at weight 400, line height 1.33, tracking -0.02em. Sub-section headings.
- **body-md:** Inter 16px at weight 400, line height 1.5. Body text.
- **body-lg:** Inter 18px at weight 400, line height 1.56. Lead paragraphs.
- **body-sm:** Inter 14px at weight 400, line height 1.43. Secondary and small text.
- **caption:** Inter 12px at weight 400, line height 1.67. Captions and fine print.
- **code:** IBM Plex Mono 13px at weight 400, line height 1.23. Code and technical values.

## Layout

Spacing follows a 4px grid: 99% of measured gaps and paddings are multiples of 4px.

- **Scale:** xs 4px, sm 8px, md 12px, lg 24px, xl 48px.
- **Sections:** 96px vertical padding between major sections.
- **Gaps:** 8px is the most common gap in flex and grid layouts.
- **Container:** content is capped at 1344px.
- **Page margin:** 48px on each side of full-width sections.
- **Breakpoints:** 479px, 520px, 599px, 600px, 640px, 720px, 767px, 880px, 1023px, 1024px, 1279px, 1280px.

## Elevation & Depth

The design avoids drop shadows. Layers are separated by tonal surface steps and hairline rings:

- `rgb(38, 63, 169) 0px 0px 0px 1px inset`

## Shapes

Interactive controls are pill-shaped. Measured radii, most used first:

- **full (9999px):** 4 elements.

## Components

Measured from the rendered page. Token values reference the tokens above.

- **button-primary (“Dashboard”):** #FEFEFE fill, #263FA9 text, 16px/400, padding 0px 24px.
- **button-primary-hover:** background #E0E3F2, text #263FA9 on hover.
- **button-outline (“Run”):** #263FA9 fill, #FEFEFE text, 16px/400, padding 0px 24px.
- **button-outline-hover:** background #1E3180, text #FEFEFE on hover.
- **button-secondary (“Linux”):** #1E3180 fill, #FEFEFE text, 14px/400, padding 0px 12px.
- **button-ghost (“macOS”):** transparent fill, #C2C9E6 text, 14px/400, padding 0px 12px.
- **input-field:** transparent fill, #060606 text, 18px/400, padding 0px.
- **link:** transparent fill, #C2C9E6 text, padding 0px.

## Do's and Don'ts

- Do use #263FA9 for the page.
- Do keep text in 4 levels: #E0E3F2, #FEFEFE, #C2C9E6, #060606.
- Do use #263FA9 as the brand accent: header, logo and key highlights.
- Do set headlines in Funnel Display with tight tracking (-0.03em).
- Do keep spacing on the 4px grid.
- Do make buttons and chips fully rounded (9999px).
- Don't use #060606 for body text; it reaches 2.3:1 on #263FA9. Keep it for large text or metadata.
- Don't add drop shadows for depth; use hairline rings and borders and contrast.
- Don't introduce new font families beyond Funnel Display, Inter and IBM Plex Mono.
- Don't use #263FA9 for large backgrounds or body text.
- Don't make interface transitions slower than 0.12s.

## Motion

Interface transitions are quick: 0.12s.

- **Easing:** `cubic-bezier(0.37, 0, 0.63, 1)`.
- **Reduced motion:** the page responds to `prefers-reduced-motion`.

Generated by [Sitepeel](https://sitepeel.dev/design-md/boat.dev/), the free DESIGN.md generator.