Signal Mobile — design system & UI screens

Communication · 9 screens · signal.org

A messaging app inbox layout with two sections: "Pinned" conversations at the top (Family, Paige Hall) and "Chats" below showing group and individual message threads with avatars, preview text, timestamps, and unread indicators. 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/signal-mobile.

Decoded design system

Signal Mobile's decoded design system: background #000000, text #FFFFFF, accent #2267F5, link #2267F5, primary #2267F5; type scale h1 34px / h2 22px / body 17px; 8px spacing base; 12px base radius. The single interactive/action color is #2267F5 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#000000`
surface	`#0F0F0F`
border	`#262626`
text	`#FFFFFF`
text_muted	`#9E9E9E`
primary	`#2267F5`
accent	`#2267F5`
link	`#2267F5`
button_bg	`#2267F5`
button_text	`#000000`

Using these colors

Action color #2267F5 — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link, button_bg are all #2267F5 — one role, not several (the action color).
accent #2267F5 — 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 →