Igora Vibrance Muted Desert 924 Extra Light Blonde Ash Beige Create a concealing look with up to 50% grey coverage with these semipermanent hair colours from Schwarzkopf Muted Desert. The shades of this Muted Desert line give you an ashy nuance and give your hair a wonderful result. Application The mixing ratio of this line is 1:1, which means 1 part oxidation and 1 part color.