I recently just got my first poly and soon I will be getting a couple more. For now they'll be in a 35 gal with a brownish gravel, but soon they'll be moved to a 180 and I'm trying to decide on a substrate color for the new tank. I've seen that white dulls them out, Black darkens them up but reduces contrast, and Red is the best for keeping blacks black and light colors bright while maintaining contrast. Unfortunately, I really really don't like red. So my question is, what does everyone think is another good option for keeping their colors sharp? So far I really like the way my Senegalus' colors have adjusted in the gravel I have her on now, but I don't have much to compare it to. What would be great is if people could post pics of the same poly with different substrate for comparison, but any advice is appreciated!