Flow design system

---
version: alpha
name: Flow
description: "Dark interface measured from flow.google.com: Google Sans type with Google Sans Text, light violet accents, tonal surfaces and 16px corners."
colors:
  background: "#000000"
  surface: "#000000"
  on-surface: "#FFFFFF"
  on-background: "#FFFFFF"
  on-surface-variant: "#E3E3E3"
  on-surface-muted: "#BFBFBF"
  on-surface-subtle: "#B8B8B8"
  surface-container-low: "#131314"
  overlay: "#00000059"
  overlay-strong: "#FFFFFF0D"
  outline: "#FFFFFF33"
  outline-variant: "#FFFFFF26"
  primary: "#BA8BFC"
  on-primary: "#000000"
  secondary: "#9E9EFF"
typography:
  headline-display:
    fontFamily: Google Sans
    fontSize: 240px
    fontWeight: 500
    lineHeight: 0.85
  headline-lg:
    fontFamily: Google Sans Text
    fontSize: 80px
    fontWeight: 500
    lineHeight: 1
    letterSpacing: -0.042em
  headline-md:
    fontFamily: Google Sans
    fontSize: 56px
    fontWeight: 400
    lineHeight: 0.9
    letterSpacing: -0.05em
  headline-sm:
    fontFamily: Google Sans
    fontSize: 45px
    fontWeight: 400
    lineHeight: 1.16
    letterSpacing: -0.011em
  title-lg:
    fontFamily: Google Sans
    fontSize: 32px
    fontWeight: 700
    lineHeight: 0.75
  body-md:
    fontFamily: Google Sans
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
  body-lg:
    fontFamily: Google Sans
    fontSize: 20px
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: -0.005em
  body-sm:
    fontFamily: Google Sans Text
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.14
  caption:
    fontFamily: Google Sans
    fontSize: 12px
    fontWeight: 400
    lineHeight: 2
  headline-lg-mobile:
    fontFamily: Google Sans Text
    fontSize: 16px
    fontWeight: 500
    lineHeight: 1
    letterSpacing: -0.04em
rounded:
  sm: 16px
  md: 32px
  full: 9999px
spacing:
  base: 8px
  xs: 2px
  sm: 8px
  md: 16px
  lg: 24px
  xl: 48px
  gutter: 8px
  section: 128px
  container: 912px
components:
  button-primary:
    backgroundColor: "{colors.on-surface}"
    textColor: "#121317"
    rounded: "{rounded.md}"
    padding: 20px 36px
    height: 60px
  button-primary-hover:
    backgroundColor: "{colors.on-surface-subtle}"
  button-outline:
    backgroundColor: "{colors.background}"
    textColor: "{colors.on-surface}"
    rounded: "{rounded.md}"
    padding: 0px
    height: 48px
  button-outline-hover:
    backgroundColor: "#C4C4C459"
  button-ghost:
    textColor: "{colors.on-surface-variant}"
    padding: 2px
  card:
    textColor: "{colors.on-surface}"
    typography: "{typography.body-md}"
    rounded: 12px
    padding: 0px
  link:
    textColor: "{colors.on-surface}"
---

# Flow Design System

## Overview

Flow describes itself as: “Try Google Flow, the ultimate AI for creatives. Transform ideas into reality using Google’s advanced generative models for cinematic video, images, & tools.” The interface is dark, built on **Near Black (#000000)** with **White (#FFFFFF)** text, and **Light Violet (#BA8BFC)** as the main accent.

Type is set in **Google Sans** and **Google Sans Text**. Headlines run large; body text is 16px. Depth comes from hairline borders and inset highlights rather than drop shadows. Corners are mostly 16px.

Measured from [flow.google.com](https://flow.google.com/about) on November 7, 2026 at 1440×900 and 390×844 from 361 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 13 roles.

- **Near Black (#000000):** Page background, seen 1 time. Token `background`.
- **White (#FFFFFF):** Primary text and headings, seen 115 times. Token `on-surface`, CSS `--color-white`.
- **Mist (#E3E3E3):** Secondary text, seen 3 times. Token `on-surface-variant`.
- **Silver (#BFBFBF):** Muted text and metadata, seen 19 times. Token `on-surface-muted`.
- **Silver (#B8B8B8):** Subtle text and placeholders, seen 2 times. Token `on-surface-subtle`.
- **Charcoal (#131314):** Raised areas one step from the page, seen 1 time. Token `surface-container-low`.
- **Near Black 35% (#00000059):** Translucent fill for cards and controls, seen 29 times. Token `overlay`.
- **White 5% (#FFFFFF0D):** Stronger translucent fill, seen 17 times. Token `overlay-strong`.
- **White 20% (#FFFFFF33):** Borders and dividers, seen 46 times. Token `outline`.
- **White 15% (#FFFFFF26):** Secondary dividers, seen 21 times. Token `outline-variant`.
- **Light Violet (#BA8BFC):** Brand accent (CSS variable). Token `primary`.
- **Near Black (#000000):** Text and icons on primary. Token `on-primary`.
- **Light Indigo (#9E9EFF):** Accent, seen 2 times. Token `secondary`.

## Typography

**Google Sans** and **Google Sans Text** share the interface. Fallback stack: `Google Sans, Google Sans Text, Roboto, sans-serif`. Other loaded fonts: Google Symbols.

- **headline-display:** Google Sans 240px at weight 500, line height 0.85. Page title (h1).
- **headline-lg:** Google Sans Text 80px at weight 500, line height 1, tracking -0.042em (16px on mobile). Section headings (h2).
- **headline-md:** Google Sans 56px at weight 400, line height 0.9, tracking -0.05em. Sub-section headings.
- **headline-sm:** Google Sans 45px at weight 400, line height 1.16, tracking -0.011em. Card and feature titles.
- **title-lg:** Google Sans 32px at weight 700, line height 0.75. Small titles.
- **body-md:** Google Sans 16px at weight 400, line height 1.5. Body text.
- **body-lg:** Google Sans 20px at weight 400, line height 1.5, tracking -0.005em. Lead paragraphs.
- **body-sm:** Google Sans Text 14px at weight 400, line height 1.14. Secondary and small text.
- **caption:** Google Sans 12px at weight 400, line height 2. Captions and fine print.

## Layout

Spacing follows a 8px grid: 90% of measured gaps and paddings are multiples of 8px.

- **Scale:** xs 2px, sm 8px, md 16px, lg 24px, xl 48px.
- **Sections:** 128px vertical padding between major sections.
- **Gaps:** 8px is the most common gap in flex and grid layouts.
- **Container:** content is capped at 912px.
- **Breakpoints:** 319px, 350px, 480px, 600px, 640px, 768px, 900px, 1024px, 1140px, 1600px, 1650px, 1920px.

## Elevation & Depth

Depth comes mostly from hairline rings and inset highlights on tonal surfaces (#131314):

- `rgba(230, 234, 240, 0.12) 0px 0px 0px 1.25px`
- `rgba(230, 234, 240, 0.12) 0px 0px 0px 0.8px`

A few raised panels add a soft drop shadow: `rgba(0, 0, 0, 0.5) 0px 16px 32px -8px`.

## Shapes

Most elements use 16px corners. Measured radii, most used first:

- **sm (16px):** 200 elements.
- **md (32px):** 184 elements.
- **full (9999px):** 52 elements.

## Components

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

- **button-primary (“Create with Google Flow”):** #FFFFFF fill, #121317 text, 13.3333px/400, 32px radius, padding 20px 36px, border 1px solid #FFFFFF33.
- **button-primary-hover:** background #FFFFFFB8, text #121317 on hover.
- **button-outline (“Pause video”):** #00000059 fill, #FFFFFF text, 13.3333px/400, 32px radius, padding 0px, border 1px solid #FFFFFF33, shadow `rgba(230, 234, 240, 0.12) 0px 0px 0px 1.25px`.
- **button-outline-hover:** background #C4C4C459, text #FFFFFF on hover.
- **button-ghost (“more_vert”):** transparent fill, #E3E3E3 text, 13.3333px/400, 50% radius, padding 2px.
- **card:** transparent fill, #FFFFFF text, 16px/400, 12px radius, padding 0px, border 1px solid #FFFFFF26.
- **link:** transparent fill, #FFFFFF text, padding 0px.

## Do's and Don'ts

- Do use #000000 for the page and lift surfaces in small steps: #131314.
- Do keep text in 4 levels: #FFFFFF, #E3E3E3, #BFBFBF, #B8B8B8.
- Do use #BA8BFC as the brand accent: header, logo and key highlights.
- Do keep spacing on the 8px grid.
- Do use 16px corners on most elements; larger surfaces also use 32px.
- Don't use heavy drop shadows; keep depth to hairline rings and tonal surfaces.
- Don't introduce new font families beyond Google Sans and Google Sans Text.
- Don't use #BA8BFC for large backgrounds or body text.
- Don't make interface transitions slower than 0.6s.

## Motion

Interface transitions are quick: 0.3s, 0.2s, 0.5s, 0.15s. Longer ambient animations run 2s.

- **Easing:** `ease-in-out`, `ease`, `ease-out`.
- **Reduced motion:** the page responds to `prefers-reduced-motion`.

Generated by [Sitepeel](https://sitepeel.dev/design-md/flow.google.com/), the free DESIGN.md generator (engine 2026.10.29+b828a475ee10).