# FlutterFlow design system

> FlutterFlow design system measured from flutterflow.io: Inter font, #0A68E0 primary on #FCFCFB, 17 color hex codes, type scale, spacing and a free DESIGN.md.

Canonical page: https://sitepeel.dev/design-md/flutterflow.io/

FlutterFlow’s website (flutterflow.io) uses the Inter font and #0A68E0 as its main color on a #FCFCFB background. Measured by Sitepeel on November 4, 2026.

## What font does FlutterFlow use?

FlutterFlow uses Inter (weights 400, 500, 510 and 600) on flutterflow.io. Page titles are 66px at weight 600 (42px on phones) and body text is 14px. Measured on November 4, 2026.

- Inter (weights 400, 500, 510, 600)

## FlutterFlow colors: palette and hex codes

FlutterFlow’s main colors are #FCFCFB (snow) for the background, #1A1A1A (charcoal) for text and #0A68E0 (vivid blue) as the main accent, with #1B519F (dark blue) and #177245 (dark teal) as other accents. Measured on November 4, 2026.

- #FCFCFB: snow
- #1A1A1A: charcoal
- #3D3D3D: graphite
- #555555: slate
- #6B6B6B: slate
- #FFFFFF: white
- #F5F5F5: snow
- #EFEFEF: mist

## What is FlutterFlow built with?

FlutterFlow’s website (flutterflow.io) is built with Astro and Fastly. Measured on November 4, 2026.

- JavaScript framework: Astro
- Analytics: Google Ads, Google Analytics, Google Tag Manager
- Hosting & CDN: Fastly

## Questions and answers

### What font does FlutterFlow use?

FlutterFlow’s website uses Inter (weights 400, 500, 510 and 600). Page titles are 66px at weight 600 (42px on phones) and body text is 14px. Measured on November 4, 2026.

### What are the FlutterFlow colors and hex codes?

On flutterflow.io: #FCFCFB (snow) for the background, #1A1A1A (charcoal) for text and #0A68E0 (vivid blue) as the main accent, with #1B519F (dark blue) and #177245 (dark teal) as other accents. The color palette above lists all 17 colors with their hex codes and where each one is used.

### What is the FlutterFlow design system?

The design system on this page is flutterflow.io’s, as measured on November 4, 2026: Inter type, #0A68E0 as the main color and pill-shaped corners, written down as a DESIGN.md. It is not FlutterFlow’s own documentation.

### What is FlutterFlow built with?

FlutterFlow’s website (flutterflow.io) is built with Astro and Fastly. The full tech stack Sitepeel found: Astro, Google Ads, Google Analytics, Google Tag Manager and Fastly. Measured on November 4, 2026.

### What is the FlutterFlow DESIGN.md?

A plain-text file with FlutterFlow’s measured colors, type, spacing, corners and components as tokens, plus short rules, in the DESIGN.md format Google published with Stitch. Your AI coding agent reads it and builds in this style. More about DESIGN.md.

### How do I use it with Claude Code or Cursor?

Download the file and put it in your project’s root folder, then ask your agent to follow DESIGN.md. Step-by-step guides: Claude Code, Cursor, Codex, GitHub Copilot.

### Is this FlutterFlow’s official design system?

No. Sitepeel measured it from flutterflow.io’s public page on November 4, 2026. It is an independent analysis, not made or approved by FlutterFlow.

### Can I use FlutterFlow’s style in my own product?

Use it to learn, prototype and compare. For a real product, make the style your own, and never copy FlutterFlow’s logo, name, pictures or text.

### How accurate are the values?

Each value was measured on the rendered page after it fully loaded, on desktop and mobile: colors where they appear, type with tracking, spacing, corners, shadows and hover states. Sites change, so check the date at the top.

## Files

- [DESIGN.md](https://sitepeel.dev/design-md/flutterflow.io/DESIGN.md): the plain file to put in your project.
- [All brand DESIGN.md files](https://sitepeel.dev/design-md/examples/index.md)

Independent analysis by Sitepeel (sitepeel.dev), not affiliated with FlutterFlow.

## The DESIGN.md file

```markdown
---
version: alpha
name: FlutterFlow
description: "Light interface measured from flutterflow.io: Inter type, vivid blue accents, tonal surfaces and pill-shaped controls."
colors:
  background: "#FCFCFB"
  surface: "#FCFCFB"
  on-surface: "#1A1A1A"
  on-background: "#1A1A1A"
  on-surface-variant: "#3D3D3D"
  on-surface-muted: "#555555"
  on-surface-subtle: "#6B6B6B"
  surface-container-low: "#FFFFFF"
  surface-container: "#F5F5F5"
  surface-container-high: "#EFEFEF"
  surface-container-highest: "#EBEBEB"
  overlay: "#1A1A1A14"
  overlay-strong: "#FFFFFF99"
  outline: "#00000014"
  outline-variant: "#1A1A1A1F"
  primary: "#0A68E0"
  on-primary: "#FFFFFF"
  secondary: "#1B519F"
  tertiary: "#177245"
typography:
  headline-display:
    fontFamily: Inter
    fontSize: 66px
    fontWeight: 600
    lineHeight: 1.03
    letterSpacing: -0.035em
  headline-lg:
    fontFamily: Inter
    fontSize: 48px
    fontWeight: 510
    lineHeight: 1.08
    letterSpacing: -0.022em
  headline-md:
    fontFamily: Inter
    fontSize: 20px
    fontWeight: 400
    lineHeight: 1.45
    letterSpacing: -0.012em
  body-md:
    fontFamily: Inter
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.43
  body-lg:
    fontFamily: Inter
    fontSize: 15px
    fontWeight: 400
    lineHeight: 1.6
    letterSpacing: -0.011em
  body-sm:
    fontFamily: Inter
    fontSize: 13px
    fontWeight: 400
    lineHeight: 1.55
  label-lg:
    fontFamily: Inter
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.55
  label-md:
    fontFamily: Inter
    fontSize: 15px
    fontWeight: 510
    lineHeight: 1.6
    letterSpacing: -0.011em
  label-sm:
    fontFamily: Inter
    fontSize: 14px
    fontWeight: 500
    lineHeight: 1.43
  headline-display-mobile:
    fontFamily: Inter
    fontSize: 42px
    fontWeight: 600
    lineHeight: 1.05
    letterSpacing: -0.035em
  headline-lg-mobile:
    fontFamily: Inter
    fontSize: 26px
    fontWeight: 510
    lineHeight: 1.2
    letterSpacing: -0.018em
rounded:
  xs: 6px
  sm: 8px
  md: 13px
  lg: 16px
  xl: 20px
  full: 9999px
spacing:
  xs: 4px
  sm: 8px
  md: 16px
  lg: 32px
  xl: 36px
  gutter: 8px
  section: 128px
  container: 1120px
components:
  button-primary:
    backgroundColor: "{colors.on-surface}"
    textColor: "{colors.on-primary}"
    typography: "{typography.body-sm}"
    rounded: "{rounded.full}"
    padding: 0px 14px
    height: 32px
  button-ghost:
    textColor: "{colors.on-surface-subtle}"
    typography: "{typography.body-md}"
    rounded: "{rounded.full}"
    padding: 8px 10px 8px 12px
  input-field:
    textColor: "{colors.on-surface}"
    typography: "{typography.label-lg}"
    rounded: 0px
    padding: 16px 18px 56px 18px
  card:
    backgroundColor: "{colors.surface-container-low}"
    textColor: "{colors.on-surface}"
    typography: "{typography.label-lg}"
    rounded: 22px
    padding: 0px
  link:
    textColor: "{colors.on-surface-subtle}"
---

# FlutterFlow Design System

## Overview

FlutterFlow describes itself as: “Build an iPhone and Android app by describing it. Start with a first version in about five minutes, ask the agent for any change, and send it to the App Store and Google Play.” The interface is light, built on **Snow (#FCFCFB)** with **Charcoal (#1A1A1A)** text, and **Vivid Blue (#0A68E0)** as the main accent.

Type is set in **Inter**. Headlines run large with tight negative tracking; body text is 14px. Depth comes from soft drop shadows. Controls are pill-shaped.

Measured from [flutterflow.io](https://flutterflow.io/) on November 4, 2026 at 1440×900 and 390×844 from 346 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 17 roles.

- **Snow (#FCFCFB):** Page background, seen 3 times. Token `background`, CSS `--page`.
- **Charcoal (#1A1A1A):** Primary text and headings, seen 42 times. Token `on-surface`, CSS `--ink`.
- **Graphite (#3D3D3D):** Secondary text, seen 9 times. Token `on-surface-variant`, CSS `--ink-2`.
- **Slate (#555555):** Muted text and metadata, seen 3 times. Token `on-surface-muted`.
- **Slate (#6B6B6B):** Subtle text and placeholders, seen 57 times. Token `on-surface-subtle`, CSS `--muted`.
- **White (#FFFFFF):** Raised areas one step from the page, seen 7 times. Token `surface-container-low`, CSS `--card`.
- **Snow (#F5F5F5):** Cards and panels, seen 6 times. Token `surface-container`, CSS `--app`.
- **Mist (#EFEFEF):** Hover and pressed fills, seen 2 times. Token `surface-container-high`, CSS `--p-widget`.
- **Mist (#EBEBEB):** Highest raised elements, seen 6 times. Token `surface-container-highest`, CSS `--p-fill`.
- **Charcoal 8% (#1A1A1A14):** Translucent fill for cards and controls, seen 2 times. Token `overlay`.
- **White 60% (#FFFFFF99):** Stronger translucent fill, seen 1 time. Token `overlay-strong`.
- **Near Black 8% (#00000014):** Borders and dividers, seen 12 times. Token `outline`, CSS `--line-1`.
- **Charcoal 12% (#1A1A1A1F):** Secondary dividers, seen 2 times. Token `outline-variant`.
- **Vivid Blue (#0A68E0):** Brand accent (CSS variable), seen 3 times. Token `primary`, CSS `--accent`.
- **White (#FFFFFF):** Text and icons on primary. Token `on-primary`.
- **Dark Blue (#1B519F):** Accent (CSS variable). Token `secondary`.
- **Dark Teal (#177245):** Accent, seen 4 times. Token `tertiary`, CSS `--success`.

## Typography

**Inter** carries the whole interface. Fallback stack: `Inter, -apple-system, BlinkMacSystemFont, Segoe UI`.

- **headline-display:** Inter 66px at weight 600, line height 1.03, tracking -0.035em (42px on mobile). Page title (h1).
- **headline-lg:** Inter 48px at weight 510, line height 1.08, tracking -0.022em (26px on mobile). Section headings (h2).
- **headline-md:** Inter 20px at weight 400, line height 1.45, tracking -0.012em. Sub-section headings.
- **body-md:** Inter 14px at weight 400, line height 1.43. Body text.
- **body-lg:** Inter 15px at weight 400, line height 1.6, tracking -0.011em. Lead paragraphs.
- **body-sm:** Inter 13px at weight 400, line height 1.55. Secondary and small text.
- **label-lg:** Inter 16px at weight 400, line height 1.55. Large buttons and tabs.
- **label-md:** Inter 15px at weight 510, line height 1.6, tracking -0.011em. Buttons, navigation and labels.
- **label-sm:** Inter 14px at weight 500, line height 1.43. Small labels and badges.

## Layout

Spacing is mostly on a 4px grid (79% of measured values), with some off-grid steps. Match the measured scale rather than rounding everything.

- **Scale:** xs 4px, sm 8px, md 16px, lg 32px, xl 36px.
- **Sections:** 128px vertical padding between major sections.
- **Gaps:** 8px is the most common gap in flex and grid layouts.
- **Container:** content is capped at 1120px.
- **Breakpoints:** 420px, 640px, 759.98px, 760px, 820px, 821px, 899.98px, 900px, 980px, 1023.98px, 1199.98px, 1279.98px.

## Elevation & Depth

Raised elements use soft drop shadows. The most used recipes:

- `rgba(0, 0, 0, 0.08) 0px 0px 0px 1px, rgba(0, 0, 0, 0.22) 0px 18px 40px -22px`
- `rgba(0, 0, 0, 0.04) 0px 1px 2px 0px, rgba(0, 0, 0, 0.14) 0px 8px 24px -14px`
- `rgba(0, 0, 0, 0.08) 0px 0px 0px 1px inset, rgba(0, 0, 0, 0.04) 0px 1px 2px 0px`

Hairline rings and inset highlights also appear: `rgba(0, 0, 0, 0.08) 0px 0px 0px 1px inset`.

## Shapes

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

- **full (9999px):** 84 elements.
- **xl (20px):** 26 elements.
- **sm (8px):** 24 elements.
- **md (13px):** 12 elements.
- **lg (16px):** 12 elements.
- **xs (6px):** 8 elements.

## Components

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

- **button-primary (“Start building”):** #1A1A1A fill, #FFFFFF text, 13px/510, 999px radius, padding 0px 14px.
- **button-ghost (“Product”):** transparent fill, #6B6B6B text, 14px/400, 999px radius, padding 8px 10px 8px 12px.
- **input-field (“What should your app do?”):** transparent fill, #1A1A1A text, 16px/400, padding 16px 18px 56px 18px.
- **card:** #FFFFFF fill, #1A1A1A text, 16px/400, 22px radius, padding 0px, shadow `rgba(0, 0, 0, 0.04) 0px 1px 2px 0px, rgba(0, 0, 0, 0.14) 0px 8px 24px -14px`.
- **link:** transparent fill, #6B6B6B text, padding 0px.

## Do's and Don'ts

- Do use #FCFCFB for the page and lift surfaces in small steps: #FFFFFF, #F5F5F5, #EFEFEF, #EBEBEB.
- Do keep text in 4 levels: #1A1A1A, #3D3D3D, #555555, #6B6B6B.
- Do use #0A68E0 as the brand accent: header, logo and key highlights.
- Do set headlines in Inter with tight tracking (-0.035em).
- Do reuse the measured spacing steps (8px, 16px, 32px).
- Do make buttons and chips fully rounded (9999px); most other elements use 20px corners.
- Don't introduce new font families beyond Inter.
- Don't use #0A68E0 for large backgrounds or body text.
- Don't make interface transitions slower than 0.6s.

## Motion

Interface transitions are quick: 0.12s, 0.15s, 0.32s, 0.24s. Longer ambient animations run 1s, 1.05s.

- **Easing:** `cubic-bezier(0.25, 0.46, 0.45, 0.94)`, `ease`, `cubic-bezier(0.2, 0.8, 0.2, 1)`.
- **Reduced motion:** the page responds to `prefers-reduced-motion`.

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

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