While the text editor is configurable, the general UI when using the dark theme has incorrect selection colors that cannot be changed.

There are two main instances I've seen for this:

First is selecting text in UI other than the main code editor. For example, in the following screenshot the bottom two lines are selected:

This also occurs in all of the UI when adjusting things like build settings, often making it difficult to edit due to barely being able to see what's selected.

Second is locate dialog. As you type, the selection color is very difficult to read: