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Fix ChatGPT White Message Bug – Dark Mode Background Patch (Tampermonkey UI Override)

Override background color on ChatGPT message surface

Author
Brian Hurd
Daily installs
0
Total installs
1
Ratings
0 0 0
Version
1.0
Created
2025-04-03
Updated
2025-04-03
Size
788 Bytes
License
N/A
Applies to

Fixes the ChatGPT white message bug that appears in dark mode when user messages have a white background instead of matching the dark theme.

  • ✅ Injects a CSS override to restore background color
  • ✅ Lightweight and non-intrusive
  • ✅ Uses Tampermonkey, no permissions needed

Bug example:

ChatGPT white background bug screenshot

Technical details:

  • Targets .bg-token-message-surface class
  • Applies background-color: var(--main-surface-secondary)
  • Injected after 500ms delay to ensure DOM readiness

Install with Tampermonkey. Customize the CSS if desired.