Selected items don't look active, pressed state is distracting
Testing master, this is what the background colours look like in the grid view:
While the background colour for selected items works well in other contexts, in the case of files it looks a bit too inanimate in my view. I'd have expected to have seen a more saturated colour (probably blue) for the selected state.
The pressed state also uses a darker shade of grey, which feels jarring - it's shown abruptly while the button is pressed. If we could animate the pressed state that would help, but otherwise I think we can safely drop it.