Losing the red coloring is not unusual. Red is fancies isnt necessarily a static color. What do you feed him? What size tank/stocking? Levels for ammonia, nitrite, nitrate & ph? What is exactly is 'weird' about his body color?
To Angelwings, wens do need to be trimmed- this can be done by an aquatic vet or yourself if this is something you feel comfortable doing (sedation & trimming).