Duolingo Mobile — design system & UI screens

Health & Fitness · 10 screens · duolingo.com

A language learning quiz screen featuring a progress bar showing "3 in a row" achievement, a multiple-choice question with four illustrated card options (mug, glass, coffee packet, coffee maker), and a success state showing "Nice job!" with a green continue button. Official Google Play listing screenshot.

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/website/duolingo-mobile.

Decoded design system

Duolingo Mobile's decoded design system: background #FFFFFF, text #713500, accent #58CC02, link #58CC02, primary #58CC02; type scale h1 34px / h2 22px / body 17px; 8px spacing base; 12px base radius. The single interactive/action color is #58CC02 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#FFFFFF`
surface	`#F6F2EF`
border	`#E9E0D8`
text	`#713500`
text_muted	`#A68160`
primary	`#58CC02`
accent	`#58CC02`
link	`#58CC02`
button_bg	`#58CC02`
button_text	`#FFFFFF`

Using these colors

Action color #58CC02 — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link, button_bg are all #58CC02 — one role, not several (the action color).
accent #58CC02 — 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, 12px, 16px, 24px, 32px, 48px, 64px

Radii

base: 12px
button: 12px

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