Signal Mobile — design system & UI screens

Communication · 9 screens · signal.org

This is a messaging application for real-time text and voice communication with contacts. The screen shows a live conversation thread with Maya Johnson, displaying a mix of blue-bubbled outgoing messages (text and voice) and dark gray-bubbled incoming replies, with timestamps, read receipts, and disappearing message indicators. Messages include text, voice notes, and ambient contextual information like message timing and delivery status.

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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/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; 6px 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: 6px
scale: 8px, 9px, 12px, 16px, 19px, 20px, 24px, 30px, 48px, 96px

Radii

base: 12px
button: 12px

Shadows (elevation)

subtle: rgba(51, 51, 51, 0.05) 0px 1.25px 2.5px 0px, rgba(51, 51, 51, 0.05) 0px 2.5px 5px 0px
card: rgba(0, 0, 0, 0.12) 0px 4px 12px 0px, rgba(0, 0, 0, 0.08) 0px 0px 2px 0px

Motion

Micro-interactions run at 294ms (dominant) with ease.

durations: 294ms
easings: ease
animated properties: color, background-color, border-color, box-shadow

Native design tokens

Token	Value
`--bulma-arrow-color`	`hsl(233deg,100%,63%)`
`--bulma-loading-color`	`hsl(221,14%,86%)`
`--bulma-white`	`hsla(221deg,14%,100%,1)`
`--bulma-white-base`	`hsla(221deg,14%,100%,1)`
`--bulma-white-invert`	`#090a0c`
`--bulma-white-on-scheme`	`hsla(221deg,14%,35%,1)`
`--bulma-black`	`hsla(221deg,14%,4%,1)`
`--bulma-black-base`	`hsla(221deg,14%,4%,1)`
`--bulma-black-invert`	`#fff`
`--bulma-black-on-scheme`	`hsla(221deg,14%,4%,1)`

…and 110 more measured on the page.

Button states (measured)

primary hover: color #1851B4
primary focus: box-shadow rgba(66, 88, 255, 0.25) 0px 0px 0px 3.75px

Layout (measured)

container max-width: 1344px
nav: 85px fixed
common grid: 2 columns

Responsive (measured)

breakpoints: 768px · 1024px
mobile (390px): hero 40px · nav hamburger

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