Artists Shirley Hill, Penny Nossett and Kathy Whitehead bill themselves as the “Color Pencil Girls” and visitors to Helen Arts & Heritage Center’s upcoming show, “Mountain Matters,” will have a chance to see why. The three artists, along with Jared Kaup of lifefire pottery in Toccoa, will display their work as featured artists for the “Mountain Matters” show. Although Hill, Nossett and Whitehead all use colored pencils, each is able to express her own personality through her work.