Dark theme on MonoDevelop 5.9.6?

Hi,

Is there any possibility to get a dark theme for the the ide (not only the code editor) with monodroid 5.9.6?

I have seen some tutorials around for Mono develop 3 and 4 but not for 5.

Does anyone have any clue?

Cheers.

Do you mean monodevelop, or monodroid? If you want to change what monodevolp looks like, go into Tools > Options, and in the Text Editor section go into Syntax Highlighting. The schemes you pick there change both text/highlight colors and background colors.
There are some default ones and you can also make your own.

Monodroid is monodevelop for android, which is NOT a unity thing.