So, I dun messed up and accidentally drag-dropped "freshnelranges" from the shelf into the viewport. Now my viewport colors and black/white balance is all wonky, and I have no idea how to undo this. Send help!
Edit: It only seems to affect one layer, so I'll be able to circumvent the problem for now. However, for future reference I'd love to know what is it that I did and how does one backtrack it.