some time i have found that victorians need a little mixing up, if they are in a specific tank change the land scape, try to match the natural habitat, i have even had a fish that wouldnt color so i did a cold water change, not to cold but just to stimulate them. also sometime a little change in feeding time and diet, vics can be manipulated to color up but you just have to try diffrent things if not a species specific tank maybe the male isnt the dominant fish and some changes need to be made. but dont get to frustrated. it will all come out in the wash.