Seahorse coloring

Hi, I’m starting up a 25 gallon seahorse tank. I’ve put a black background on the tank and the live sand is a dark, almost black color. Since seahorses change colors to their surroundings, I was wondering if anyone has any ideas as to what this will do to their color. Of course, I’m going to be decorating with red and orange tree sponges along with yellow finger gorgonians my rocks are even a rusty reddish color because they are manufactured live rock that look like lava rocks. If anyone has any thoughts on this or has done something similar to this color scheme, please let me know! I’m just curious:P