Steps to reproduce the issue:
- Install Orion Version 0.99.136.2-rc (WebKit 623.1.8.0.0)
- Enable light theme
- Open a new private tab
- Type something in the address bar
- You cannot see what you have written because both the URL bar and the text are white..

Video of the issue:
Expected behavior:
The URL should be black or some other color that makes it readable.
Example from the current -beta build:

Orion and macOS versions:
Version 0.99.136.2-rc (WebKit 623.1.8.0.0)
Tahoe (26)