I made up a pair of horns using my old molds to show how a black lowlight effects the appearance of different pigments. Blue lines are to match locations as it's a little hard to make out on some.

From the tip down;
Plain
White
Standard pink
Red
Orange
Yellow
Green
Blue
Black

PLEASE NOTE: THESE ARE JUST FOR COLOUR DEMONSTRATION. STRIPED HORNS ARE NOT FOR SALE
For why, see here: http://www.furaffinity.net/view/10895105/