Aldo Chiarelli - 2011-10-03

I'm new on this forum.
I wanted to know if it's possbile to have different prices for the same product. I'll explain what I mean: I have created a unique product but may have different colors, so different prices. The color is chosen by the customer through attibut set. I should make more items and place them in the price list or is there another method?
A red product, price € 100;
product B-yellow color, price € 130;
C green product, price 150 €.

Thanks !!!