I've had my rescue too for about 3 years now and I've noticed his back wing feathers having a greenish hue to them. When I got him he was dyed pink (not sure how)
but those feathers have been long gone due to molting. I'm not sure if this green color is maybe due to diet or lack of proper sunlight ?(sun lamp in on its way in the mail) He eats zupreem pellets and I'm trying to get him to eat healthy table foods but it's an ongoing struggle. Has anyone seen this before?