Greg has taught a few classes now that utilize the different Color Oils.
The class that really taught about and represented all the Color Oils was: Previous Class: Foundation of Mystical Healing – Plant Prana Essential Oils (plantpranaoils.com)
The Color Oils are:
White Light
Violet Healer
Green Healer
Blue Healer
Orange Healer
Red Healer
Gold Healer
Sacred Blue