The color swatch representing this color was dyed at a dark (4-6 teaspoons dye powder) shade.
This color tends to absorb moisture from the air and can get lumpy, Keep cap tightly sealed on the jar and shake jar violently to break up lumps for use.
Grey is basically a light black color so you can use black to make grey by using less black. For tie Dyeing try 1/2 tsp. black 92 per cup of water to get a nice grey color.