Presuming chilli powder is made by grinding dried chillis why dont we see green chilli powder?
That's like asking 'why do men have nipples' ?? :-\
I brought some Habanero chillies (red and orange colour) from tesco then dried them in a very low oven for an hour, then i ground them to powder in a coffee grinder and they came out red/brown colour, Bloody hot chilli powder!!!! even darth would be proud to use this stuff.
Anyway i think they mainly use red chillies for chilli powder, chillies turn red when they ripen.
Just ask Google !
http://www.hatch-chile.com/product.asp?productid=9963
Heh cool!
YF: Men and nipples was indeed my next question ;)