Dark Mode Theme

Pls. Windows has a dark theme, and your website shows a dark theme, so unless it’s already available, pls add it.

There is a dark theme: https://manual.audacityteam.org/man/themes.html

True, but there could be some improvements (at least on a mac). For example the scroll bars, window, and drop-down menus remain light themed.
Screen Shot 2021-09-19 at 11.42.34 PM.png

That comes from your Desktop theme.
If you switch to a dark Desktop theme, then you should see those elements look better.

This may be fixed in an upcoming version: https://github.com/audacity/audacity/pull/1674

Can you please give me ‘Default Dark theme ImageCache.png’ file?

The Default Dark theme does not have an ImageCache.png file. The theme is built into Audacity (https://manual.audacityteam.org/man/themes.html)