Misc. bug: Webui: Default light theme code blocks are not visible

[mashdragon]

Name and Version

version: 4621 (6eecde3)
built with cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0 for x86_64-linux-gnu

Operating systems

Linux

Which llama.cpp modules do you know to be affected?

llama-server

Command line

llama-server -m <any model>

Problem description & steps to reproduce

1. Put a code block as your message to send to the LLM.
2. Notice the code block on the default light theme has many parts that are basically invisible:

I always need to switch to "wireframe" to get it to show better.

First Bad Commit

First new webui commit

Relevant log output