This is kind of a small thing, but I've always thought that whenever you mouse over a song, there's barely any change in color, and it's REALLY hard to tell when you've moused over to click on PDF or whatever. Again, it's really small, but it's one of the very few things about the site that I don't like.
Just to make sure I understand what you mean - you're referring to the tinge of gray the row color gets highlighted when you mouse over it and suggesting that it could be darker?
https://cdn.discordapp.com/attachments/401094846107877377/759922715133476904/unknown.png
Yes. It's just barely noticeable.