Color Mark Medium Brown Color Mark is true temporary liquid hair color for touching up gray roots. Not a mascara. Not a crayon. For accurate hair coloring with precise professional results: ColorMark is the only instant, liquid hair color that prolongs the look and feel of freshly colored hair. Stays true, looks salon-new, until you shampoo it out. For that first-day color look and feel at your fingertips: If you color your hair to cover gray, your gray roots will begin to show two to three weeks before your next application of permanent hair color. Now, you can just touch up the gray that is showing. A bottle of ColorMark will last from 2-4 months, depending on the amount of gray that needs to be covered.