Railway — decoded design system

railway.app · dark · deep decode — measured live

Railway'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/railway.app.

Decoded design system

Railway's decoded design system: background #13111C, text #FFFFFF, link #F7F7F8, primary #F7F7F8; type scale h1 54px / h2 36px / body 16px; 8px spacing base; 8px base radius. The single interactive/action color is #553F83 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #553F83 — the single interactive color; only on things you click or must notice, never large fills.
• primary, link are all #F7F7F8 — one role, not several (the action color).

Typography

• Heading: IBM Plex Serif
• Body: Inter
• h1: 54px
• h2: 36px
• body: 16px

Spacing

• base unit: 8px
• scale: 4px, 6px, 8px, 12px, 16px, 24px, 32px, 40px, 64px, 80px

Radii

• base: 8px
• button: 8px

Motion

Micro-interactions run at 150ms (dominant) with ease-out.

• durations: 150ms · 200ms · 3000ms
• easings: ease-out · ease-in-out
• animated properties: transform, opacity, background-color, color

Native design tokens

…and 110 more measured on the page.

Button states (measured)

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

Layout (measured)

• container max-width: 1696px
• nav: 32px relative
• common grid: 3 columns

Motion choreography (measured)

Load order: div.flex → div.osano-cm-info-dialog__in → div.osano-cm-window__dialog → button.osano-cm-dialog__close → button.osano-cm-dialog__close → button.osano-cm-dialog__close

Scroll reveal: 23 elements rest at opacity 0, translateY(24px), animate in over 3000ms.

Overlay recipe (measured)

dialog panel: #000000 · radius 12px · enter 200ms linear

Responsive (measured)

• breakpoints: 768px
• mobile (390px): hero 40px · nav inline

Install it

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

npx shadcn add mozaika.design/r/decode/railway.app

Or as a Meta Astryx theme — a ready defineTheme file with the measured hover/press states baked in:

curl -o src/themes/railway.theme.ts https://mozaika.design/api/astryx/decode/railway.app.ts

registry item · astryx theme · or query it over MCP: get_design_system("Railway")

Export: DESIGN.md

# Railway — Design System

> dark — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#13111C` |
| surface | `#211F29` |
| border | `#36343E` |
| text | `#FFFFFF` |
| text_muted | `#A5A4A8` |
| primary | `#F7F7F8` |
| link | `#F7F7F8` |
| button_bg | `#553F83` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#553F83` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `primary`, `link` are all `#F7F7F8` — one role, not several.
- **Page coverage** (full-page screenshot pixels): `#13111C` 58.6% · `#202A39` 34.2% · `#49485C` 7.2%

## Typography

- Heading: **IBM Plex Serif** _(free fallback: Newsreader)_
- Body: **Inter**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 54px / 500 · lh 60px · tracking -1.96px |
| h2 | 36px / 400 · lh 48px · tracking -0.72px |
| h3 | 20px / 400 · lh 28px |
| body | 16px / 500 · lh 24px |
| small | 14px / 500 · lh 20px |

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

> **Fonts —** IBM Plex Serif may be proprietary — safe free fallback: Newsreader (Google Fonts). Inter — free, on Google.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 4px, 6px, 8px, 12px, 16px, 24px, 32px, 40px, 64px, 80px — snap all gaps/padding to these
- section rhythm: 96px top/bottom padding per section (measured)

## Radius
- base: 8px
- button: 8px
- card: 4px
- pill: 9999px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#553F83` / `#FFFFFF` | 1px solid rgba(255, 255, 255, 0.15) | 8px | 12px 24px 12px 24px | 500 20px / -0.2px | none |
| secondary | `rgba(0, 0, 0, 0)` / `#F7F7F8` | none | 6px | 0px 12px 0px 12px | 500 14px | none |

**States (measured, not guessed)**

- primary focus: outline `1px auto rgb(16, 16, 16)`
- secondary hover: background `rgba(255, 255, 255, 0.05)`
- transition: `filter 0.15s cubic-bezier(0.4, 0, 0.2, 1)`

## Motion
- durations: 150ms (dominant) · 200ms · 3000ms
- easings: `ease-out` (dominant) · `ease-in-out`
- animated properties: transform, opacity, background-color, color

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 |
|-------|-------|
| `--osano-clear-dialog-background` | `rgba(24,13,67,0)` |
| `--osano-button-border-color` | `#33323e` |
| `--osano-button-background-color` | `#59497a` |
| `--osano-button-foreground-color` | `#FFFFFF` |
| `--osano-dialog-background-color` | `#13111c` |
| `--osano-dialog-foreground-color` | `#FFFFFF` |
| `--osano-info-dialog-overlay-color` | `rgba(0,0,0,0.45)` |
| `--osano-link-color` | `#ffffff` |
| `--osano-toggle-off-track-color` | `#535361` |
| `--osano-toggle-off-thumb-color` | `#FFFFFF` |
| `--osano-toggle-on-track-color` | `#13111c` |
| `--osano-toggle-on-thumb-color` | `#13111c` |

_…and 108 more measured on the page._

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

## Layout (measured)
- container max 1696px · common grid: 3-col
- nav: 32px relative

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 124 | 1716 | 3 | — | 0/16 | 9/83/9 |
| 1840 | 1712 | — | — | 0/0 | — |
| 3552 | 765 | — | — | 0/0 | — |
| 4317 | 761 | — | — | 0/0 | — |

## Motion choreography (measured)
Load order: `div.flex` @0ms → `div.osano-cm-info-dialog__in` @1685ms → `div.osano-cm-window__dialog` @1857ms → `button.osano-cm-dialog__close` @1858ms → `button.osano-cm-dialog__close` @1858ms → `button.osano-cm-dialog__close` @1858ms
- `div.bg-pink-200` — transform translateX(-48.1765%)→translateX(-47.1923%) — 150ms cubic-bezier(0, 0, 0.2, 1)
- `circle.animate-pulse-station` ×5 — opacity 1→0.1 · transform scale(0)→scale(1) — 3000ms cubic-bezier(0.25, 0.1, 0.25, 0.8) · loops
- scroll reveal: 23 elements rest at opacity 0, translateY(24px), animate in over 3000ms (6 revealed during the drive).
- overlay dialog (auto-opened): panel #000000 · r 12px · border 1px solid rgba(255, 255, 255, 0.1) · shadow rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.1) 0px 4px 6px -4px
  - enter: opacity from 0 · 200ms linear

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

## Components (measured)
- link: #A667E4 · underline

## Responsive (measured)
- breakpoints: 768px
- mobile (390px): hero 40px · 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.

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> **Decoded with Mozaika** — measured live, not guessed. Full decoded design system + one-command install: mozaika.design/decode/railway.app

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