Theme 'Noir' has background color issue with alerts and code blocks in light mode

[schneekluth]

Describe the bug
When using theme noir in light mode the background color of code blocks and alerts is not distinguishable from page background color.

To Reproduce
Steps to reproduce the behavior:

1. In config/_default/params.toml set colorSheme = "noir"
2. Turn on light mode if not already set
3. Place an alert or codebloock

Expected behavior
Visually distinguishable background for named elements.

Screenshots

Desktop (please complete the following information):

• OS:
  • Windows 11
  • OSX 15
• Browser:
  • Chrome: 129
  • Firefox: 131

Hugo & Blowfish versions
Which version of Hugo and Blowfish are you using?

• Hugio: 135.0
• Blowfish: 2.78.0