The foliage really was this yellow, and an image search for the cultivar suggests that it probably shouldn't have been. (What would cause this? Some kind of fertilizer problem?)
It's nevertheless kind of a nice effect, if you can bring yourself to pretend that it's supposed to look like that. I mean, at least it's a smooth, uniform sort of yellow.
Masdevallia Copper Angel 'Highland' = Masdevallia triangularis x Masdevallia veitchiana (Ref.)