So I set up a makeshift backdrop using a sheet. Just to test it out. I took the following picture of my dog to test it out, and aside from needing a little ironing of wrinkles out, and the little creases he makes on the sheet... The sheet is blue but it looks almost brown in the shot and I am not sure why every picture I take has a brown tint to it, its dark out right now, and this is taken with the indoor lighting... Why is it so brown?