Add to ChromeMac OS X Aqua theme for ChatGPT, Claude and Gemini
Gel buttons, pinstripe backgrounds, traffic-light window controls and Lucida Grande. The early-2000s Mac desktop, around your chat.
Free · chatgpt.com, claude.ai and gemini.google.com · Off in one key with Alt+Shift+T
The Aqua look, 2001–2003
Apple showed Aqua at Macworld in January 2000 and shipped it with Mac OS X 10.0 in March 2001. Buttons looked like drops of blue gel, window backgrounds had fine pinstripes, and the red, yellow and green controls became the most copied window chrome of the decade.
The Aqua theme brings that era to ChatGPT, Claude and Gemini: pinstriped panels, glossy blue accents, the traffic lights and Lucida Grande-style type.
- Pinstripe background pattern
- Glossy blue gel accent buttons
- Red, yellow and green window controls (decorative)
- Lucida Grande-style UI type with system fallbacks
What changes
- Base
- Light
- Font
- Lucida Grande-style sans
- Code font
- Monospace
- Corners
- 12px radius
- Frame
- mac aqua
- Effects
- None
- Palette
Nothing is hidden, moved or covered. Frames are decoration around the app and never sit over the input, menus or send button.
Aqua on ChatGPT, Claude and Gemini
One theme, every app. Pick it once and it follows you across chatgpt.com, claude.ai and gemini.google.com.
How to use the Aqua theme
- 1
Install ChatTheme
Add the free ChatTheme extension to Chrome, Edge, Brave or Arc from the Chrome Web Store.
- 2
Open ChatGPT, Claude or Gemini
Go to chatgpt.com, claude.ai or gemini.google.com and click the ChatTheme icon in the toolbar to open the side panel.
- 3
Pick Aqua
Click Aqua in the Themes tab. It applies instantly without reloading. Press Alt+Shift+T any time to switch back to the stock look.
Want a variation? Open the Create tab and type something like “Aqua but pink” or “add stickers”. AI edits the theme live and you can undo any step.