[BUG] Light Color Scheme Broken on 2.1.77+

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

With any version newer than 2.1.76 the colors in the light scheme seem washed out and ... weird:

<img width="600" height="128" alt="Image" src="https://github.com/user-attachments/assets/c9580d0e-90dd-4249-ba8c-fdec54b242e5" />

What Should Happen?

Going back to 2.1.76 gave me the correct look again:

<img width="552" height="152" alt="Image" src="https://github.com/user-attachments/assets/76ab2067-6165-49d8-8086-dcc24192474b" />

Error Messages/Logs

n/a

Steps to Reproduce

1. Install the latest claude code with the light theme in a light terminal.
2. Observe the weird color scheme.

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.76

Claude Code Version

2.1.84

Platform

Other

Operating System

macOS

Terminal/Shell

Other

Additional Information

My Terminal emulator is Alacrity with tmux as the multiplexer.