Actually, most of the adult coryphaenoides I've seen are truly chocolate brown in color when not in spawning mode. They may not be the most colorful cichlid, but I do think they're handsome fish.
Actually, it seems that it's the emerald green that is quite rare in Chocolates. I've seen and had several 'temporalis' that were mostly the dark burgundy color but my latest strain has a nice blend of green and deep red, especially when in spawning mode. Non-spawning coloration they are mostly burgundy. Here's a video of a pair guarding young.
[video=youtube;juC42pYW9ug]http://www.youtube.com/watch?v=juC42pYW9ug&feature=g-upl&context=G22615a4AUAAAAAAAOAA[/video]