YouTube Music Mobile — design system & UI screens
Music streaming player showing song playback and engagement. The screen displays a full-width album artwork card with song metadata below (title "Love On" by artist "Selena Gomez"), engagement metrics (likes, comments, saves, shares), a scrubber timeline with playback position indicator, and standard playback controls (skip back/forward, play/pause, shuffle, repeat).
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/youtube-music-mobile.
Decoded design system
YouTube Music Mobile's decoded design system: background #030303, text #FFFFFF, accent #291A1F, link #291A1F, primary #291A1F; type scale h1 34px / h2 22px / body 17px; 8px spacing base; 12px base radius. The single interactive/action color is #291A1F — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.
Color roles
| Role | Value |
|---|---|
| bg | #030303 |
| surface | #121212 |
| border | #282828 |
| text | #FFFFFF |
| text_muted | #9F9F9F |
| primary | #291A1F |
| accent | #291A1F |
| link | #291A1F |
| button_bg | #291A1F |
| button_text | #030303 |
Using these colors
- Action color
#291A1F— the single interactive color; only on things you click or must notice, never large fills. primary,accent,link,button_bgare all#291A1F— one role, not several (the action color).- accent
#291A1F— 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: 8px, 16px, 24px, 36px
Radii
- base: 12px
- button: 12px
Motion
Micro-interactions run at 280ms (dominant) with cubic-bezier(0.4, 0, 0.2, 1).
- durations: 280ms
- easings:
cubic-bezier(0.4, 0, 0.2, 1) - animated properties: border, box-shadow
Native design tokens
| Token | Value |
|---|---|
--boq-chrometransition-background | #eee |
Button states (measured)
- primary hover: border
1px solid rgba(0, 0, 0, 0)· background#F2F8FF - primary focus: border
1px solid rgb(6, 95, 212)
Responsive (measured)
- mobile (390px): hero 20px · nav inline
Full design system, per-section tokens & DESIGN.md / Tailwind / CSS exports →