Trello design system

What font does Trello use?

Trello’s website uses Charlie Display for headings and Charlie Text for body text. Charlie Display is not on Google Fonts; the closest free match is Archivo; Charlie Text is not on Google Fonts; the closest free match is Figtree.

Trello colour palette

Trello’s home page is light (#F4F5F7 background, #091E42 text) and uses #091E42 for its main actions. Its palette: #FFFFFF, #F4F5F7, #0065FF, #091E42, #FAFBFC, #DEEBFF.

• #FFFFFF
  66.1% · backgrounds
• #F4F5F7
  11.3% · backgrounds
• #0065FF
  9.3% · backgrounds
• #091E42
  4% · text
• #FAFBFC
  2.7% · backgrounds
• #DEEBFF
  2.5% · backgrounds
• #172B4D
  2.3% · backgrounds
• #0747A6
  1.2% · backgrounds
• #F0F0F0
  0.3% · backgrounds
• #0052CC
  0.2% · text

Type scale

Each size the page sets text in, with its weight and line height. Trello’s largest type is 48px at weight 500.

Spacing and shape

Spacing steps the page leans on: 4px, 8px, 12px, 16px, 20px, 24px, 32px, 40px, 48px, 52px, 60px, 76px.

Corner radii: 1px, 2px, 3px, 4px, 4.8px, 8px, 17px. 4 shadow levels measured.

What makes Trello look like Trello

Mostly neutral: 83% of the page is #FFFFFF and #F4F5F7 and other neutrals; #0065FF (9.3%) fills whole sections.

#091E42 is an accent: 4% of the page, used for text and small fills such as buttons. Don't fill large areas with it.

#172B4D is an accent: 2.3% of the page, as one of a few coloured bands or panels. Use it for a band or two, never as the page ground.

The largest type (48px Charlie Display) is medium weight, not bold (500).

Trello DESIGN.md for Claude Code, Cursor and Lovable

A DESIGN.md is the brief an AI coding tool reads before it writes UI. This one carries everything on this page as rules a model follows: the allowed colours and what each is for, the fonts with free stand-ins, the type scale, spacing, corners, and the things Trello’s design never does.

Put it in your project root and ask your tool to follow it: “Read DESIGN.md and build [your product] in this design language.” It describes a style, not Trello’s product, so use your own name, words and images.

Download Trello DESIGN.md · View it as text

As CSS variables

The measured values as CSS custom properties, with free fonts standing in for licensed ones. Use them to learn from or to start a project in a similar style; Trello’s name, logo, words and images are theirs.

@import url("https://fonts.googleapis.com/css2?family=Figtree:wght@400;500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Archivo:wght@500;700&display=swap");

:root {
  --color-background: #F4F5F7; /* Background */
  --color-surface: #FFFFFF; /* Surface */
  --color-text: #091E42; /* Text */
  --color-text-muted: #505F79; /* Text muted */
  --color-border: #DFE1E6; /* Border */
  --color-action: #091E42; /* Action */
  --color-on-action: #FFFFFF; /* On action */
  --color-link: #091E42; /* Link */
  --color-positive: #00C7E5; /* Positive */
  --color-warning: #FFAB00; /* Warning */
  --color-0065ff: #0065FF; /* 9.3% of the page, as fills */
  --color-fafbfc: #FAFBFC; /* 2.7% of the page, as fills */
  --color-deebff: #DEEBFF; /* 2.5% of the page, as fills */
  --color-172b4d: #172B4D; /* 2.3% of the page, as fills */
  --color-0747a6: #0747A6; /* 1.2% of the page, as fills */
  --color-f0f0f0: #F0F0F0; /* 0.3% of the page, as fills */
  --font-body: "Charlie Text", "Figtree", sans-serif; /* Charlie Text on the site; Figtree renders */
  --font-display: "Charlie Display", "Archivo", sans-serif; /* Charlie Display on the site; Archivo renders */
  --type-display-large: 48px; /* Display Large, weight 500 */
  --type-display-large-leading: 60px;
  --type-display-small: 36px; /* Display Small, weight 500 */
  --type-display-small-leading: 48px;
  --type-headline: 24px; /* Headline, weight 400 */
  --type-headline-leading: 36px;
  --type-title-large: 20px; /* Title Large, weight 400 */
  --type-title-large-leading: 30px;
  --type-title-small: 19.2px; /* Title Small, weight 400 */
  --type-title-small-leading: 28.8px;
  --type-body: 16px; /* Body, weight 400 */
  --type-body-leading: 24px;
  --type-label: 12px; /* Label, weight 400 */
  --type-label-leading: 16px;
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;
  --space-40: 40px;
  --space-48: 48px;
  --space-52: 52px;
  --space-60: 60px;
  --space-76: 76px;
  --space-80: 80px;
  --space-128: 128px;
  --space-192: 192px;
  --radius-xs: 1px;
  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  --radius-xl: 4.8px;
  --radius-2xl: 8px;
  --radius-3xl: 17px;
}

How this was measured

PikSpec’s scanner read the trello.com home page in Chrome at 1440px wide on 15 October 2026: the computed styles of its elements, the fonts that rendered and how much of the page each colour covers. Websites change; capture the page yourself with PikSpec for today’s values, any page, and exports in five formats.

Trello is a trademark of its owner. This page is an independent measurement and is not affiliated with or endorsed by Trello.

Similar light designs: Airbnb · Airtable · Allbirds · Anthropic · Apple · Arc

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