Here is some color theory and reference material relating to the “Drum Carding for a Specific Project” workshop. (more later)
The color wheel: Humbolt University has an “Understanding Color” web site explaining the science of color. There is an interactive color wheel as well, which is a great reference if you are using the Deb Menz DVD “Fiber Preparation and Multicolor Blending Techniques”.
Mixing colors on a drum carder: This video has a nice summary of how to use the color wheel to mix specific colors.