Change thumbnail outline color

I noticed the thumbnail viewer outline (white) is a bit bolder which is nice, because since the move past V3 it has been hard to see the selected thumb. Now I don't have somethign shot on white to check but I am wondering how hard it will still be to find the selected thumb on a shot on white - like a product or ecommerce shot. Can we please change the color of the outline to something other than white for these cases?