While I don't disagree, I think your example is not going to be that common. What does your example look like if you select the album to the right of the one in the screenshot?
Then obviously that one's body text will get highlighted, and the expanded panel will display it's tracks. (maybe I don't understand your question?)
Do you have 'auto-pick panel colours' enabled? I think your current example is like a 'perfect storm' where the auto-picked colours (based on the album art color) almost match your background.
First of all, to be clear, this is a skinning request, not a general change to MusicBee's operation or looks.
Auto-pick colours is off, and I always have it off. (I personally don't like it much)
For many of my (and possibly other's) skins that will result in similar situations as in my screenshot.