Polymerous, I do the same thing as you. I get as many different colors as possible. In the north the colors that fade are red and pink. I don't have any trouble with the rest fading so every season I usually replace all of my red and pink. Shoplet.com is a good source for clips as is staples. Last year Staples had a lot of new colors including a vibrant orange, lime green and purple. I always check there every year.
