Markdown is without background colour with 0.22 version

[euberdeveloper]

Search terms

markdown background

Expected Behavior

Before my markdown looked like this:

Actual Behavior

Now, after 0.22, like this:

The difference is in the background of the markown.

Steps to reproduce the bug

You can just run npm run docs in my project https://github.com/euberdeveloper/dree, with the versions 0.21 and 0.22 and look at the differences

Environment

• Typedoc version: 0.22.10
• TypeScript version: 4.5.4
• Node.js version: 16.3.0
• OS: Ubuntu 20

[Gerrit0]

This is because, in 0.22, TypeDoc takes the background color from the code, and the default theme, light-plus has a background of #FFFFFF. I don't like the fix...