AT what level are Archons and Pixi's Grey?

[Lebatt]

I want to farm some dust from Pixi's and Archons (KFC) but if i am soon out of the good drop range i dont want to waste time.

[TheCentrix]

I'm level 50 and I believe they are yellow for me... (or still red? XD I dont remember)

I guess they are grey at level 65-70

[joecracker]

at 63 they atr green, they are both lvl 60 mobs

[Lebatt]

At what point do they stop dropping much drops?