After hunting down the color on the Yamamoto site it looks like its just smoke with gold and black glitter. Black in clear plastic will get you smoke. If you're using X2 colorant just a drop in 4 ounces. Other brands of colorants maybe 3 or four drops in four ounces. The Yamamoto site leaves a lot to be desired when it comes to decent color plates of their plastics, but this appears to be a smoke.
