Wella Koleston Perfect Permanent Creme Hair Color 7/75 Medium Blonde / Brown Red Violet 2 oz. Koleston Perfect Permanent Haircolor in 113 shades, lets you create anything you imagine. Now with an Upgraded formula with more even and balanced color results through the lengths and ends, Koleston Perfect Permanent Haircolor is gentler on hair, leaving it looking healthier and shiner for 69% more shine compared with untreated hair.