v149 · CSS · Privacy
Accent Color UI Kit
A gallery of standard UI components styled with AccentColor and AccentColorText CSS system colors. Use the colour picker to simulate any OS accent color and toggle between the "regular tab" (Chrome 149 fixed fallback) and "PWA context" (real OS color) modes to see how the components adapt.
Buttons
New
Learn more →
Form controls
Progress & range
Chrome 149 regular tab — fixed fallback
AccentColor resolves to fixed system-default, not user OS color. Same across all Chrome 149 users.
Chrome 148 / pre-fix — real OS color leaked
Before Chrome 149: AccentColor revealed the actual OS accent — different per user, usable for fingerprinting.
see also
- Accent Color Demo — resolved value probe
- Fingerprinting Explainer — why the restriction exists
- Scope Detection — live PWA vs tab detection
implementation reference
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗