I have the light blue background in my growout tank and it does not look any better... Im still itching to paint it black. if you are going for a blueish hue, its better to play around with the lighting instead. such as actinic or a 20,000k bulb.
meh idc just thought it was nice i cant put any background cause all my tanks are black back its painted so unless i stick it from the inside which i dont think is a good idea ill only have black lol