That air cleaner top would look great painted to match the valve covers. Just would have to get a filter with a black seal.
If I change the color on the air cleaner I'll probably go black, Maybe make the valve covers black too. I'm going to leave it orange for now since people expect an Air Grabber top to be orange but if I get tired of orange I'll probably powder coat it black. I don't think I'd go with the turquoise color.