Trello Mobile — design system & UI screens

Productivity · 2 screens · trello.com

A bright blue task management card list showing completed items with checkmarks and attachment icons. Features a prominent drag-and-drop affordance with a curved arrow, demonstrating card reordering interaction within the "My work" collection. Official Google Play listing screenshot.

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This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/website/trello-mobile.

Decoded design system

Trello Mobile's decoded design system: background #0065FF, text #FFFFFF, accent #0065FF, link #0065FF, primary #0065FF; type scale h1 34px / h2 22px / body 17px; 8px spacing base; 12px base radius. The single interactive/action color is #0065FF — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#0065FF`
surface	`#0F6EFF`
border	`#267CFF`
text	`#FFFFFF`
text_muted	`#9EC4FF`
primary	`#0065FF`
accent	`#0065FF`
link	`#0065FF`
button_bg	`#0065FF`
button_text	`#0065FF`

Using these colors

Action color #0065FF — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link, button_bg are all #0065FF — one role, not several (the action color).
accent #0065FF — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.

Typography

h1: 34px
h2: 22px
body: 17px

Spacing

base unit: 8px
scale: 4px, 8px, 10px, 11px, 12px, 13px, 16px, 20px, 24px, 32px

Radii

base: 12px
button: 12px

Shadows (elevation)

card: rgba(9, 30, 66, 0.2) 0px 3px 5px 0px, rgba(9, 30, 66, 0.31) 0px 0px 1px 0px
overlay: rgba(9, 30, 66, 0.15) 0px 8px 16px 0px

Motion

Micro-interactions run at 250ms (dominant) with ease.

durations: 250ms · 300ms · 150ms
easings: ease · ease-out
animated properties: margin-left, background-color, box-shadow, transform

Native design tokens

Token	Value
`--atlassian-recommended-system-fonts`	`-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, "Fira Sans", "Droid Sans", "Helvetica Neue", sans`
`--atlassian-recommended-sans-system-fonts`	`ui-sans-serif, -apple-system, "system-ui", "Segoe UI", Ubuntu, "Helvetica Neue", sans-serif`
`--atlassian-sans-font-family`	`"Atlassian Sans", ui-sans-serif, -apple-system, "system-ui", "Segoe UI", Ubuntu, "Helvetica Neue", sans-serif`

Button states (measured)

primary hover: border 1px solid rgb(7, 71, 166) · background #0747A6
primary focus: border 1px solid rgb(7, 71, 166) · box-shadow rgba(122, 134, 154, 0.5) 0px 0px 0px 3.2px · background #0747A6 · outline 2px solid rgb(9, 30, 66)

Layout (measured)

container max-width: 1140px
common grid: 3 columns

Motion choreography (measured)

Load order: div×2 → div.otFlat

Overlay recipe (measured)

dialog panel: rgba(0, 0, 0, 0) · radius 0px

Input (measured)

height 49.9844px · radius 4.8px · focus ring 2px solid rgb(9, 30, 66)

Responsive (measured)

mobile (390px): hero 32px · nav hamburger

Full design system, per-section tokens & DESIGN.md / Tailwind / CSS exports →