Mushroom Gray is from our collection of Rustic Colors. It's a warm, light gray color. Cookie Countess Gel Colors are highly concentrated and provide vibrant color with less liquid. Have fun experimenting by using a pinch of these colors to create softer hues.  Gel colors have a 5 year shelf life.  Cookie Countess Gel Colors are allergen friendly. The following ingredients are not used in our facility and will not come into contact with our gel colors – Soy, Eggs, Peanuts, Tree Nuts, Mustard Seed, Shell-fish, Fish, Milk, Eggs, or Wheat and/or Gluten. Certified kosher pareve (OU) Our color swatches are mixed into white royal icing, taken in natural light. Note that colors may appear differently on your screen. Ingredients: Water, sugar, glycerine, modified corn starch, FD&C yellow #6, FD&C red #40, FD&C blue #1, carrageenan, potassium sorbate (preservative), xanthan gum, citric acid, FD&C #3, maltodextrin, dextrose. These are colors for mixing into icing (royal icing, buttercream, etc), and cannot be used in an airbrush machine. For our line of airbrushing colors, visit here.