Sidebar nav: Change background in darkmode
What does this MR do and why?
Sidebar nav:
- Use subtle background color in darkmode
- Use section border color in darkmode
- Does not affect lightmode
Part of our vision to roll out the new darkmode vision.
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Screenshots or screen recordings
| Before | After |
|---|---|
 |
 |
 |
 |
How to set up and validate locally
Related to #474922, gitlab-org/foundations&6