Is there an existing issue for this?

• I have searched the existing issues

Can the issue be reproduced with the default theme (daylight/midnight)?

• I was able to reproduce the issue with the default theme

Could the issue be due to extensions?

• I've ruled out the possibility that the extension is causing the problem.

Describe the problem

在背景颜色下增加自定义颜色
参考样式如下：

Expected result

如题

Screenshot or screen recording presentation

No response

Version environment

- Version: 
- Operating System: 
- Browser (if used):

Log file

none

More information

No response