Weekend Poll - What colour should I paint the back of my tank?

[monocus]

if your undecided,use a plastic christmas paper that the colour is printed on foil(solid colour).if you don't like it you can always change the colour .the next tank i build i am thinking of air brushing the back to make it look like more depth.but all the tanks i've seen there is a lot of coralline growing on the back so your background disappears