For me, 2 lbs of carared in a 5 gallon amber ale did not give a red color at all, like beeber above stated. I've used 1.5lbs of english crystal 55L and that was as close to red as I've got without adding darker malts. Of course, like Boy said above, that may be more crystal than you want in a beer.
Bottled: Old Peculier, Kumquat Kolsch, Dopplebock
Kegs: Helles, Oktoberfest, Hefeweizen
On Deck: English Bitter, RIS