A collection of links to online and print resources that I have found useful.

Color Theory 

Hue, Value, Saturation  
Mixing Complementary Colors 
More on Complementary Color Mixing (mostly text)
Complementary Colors including brief description of various color models
Optical Blending 
Pointillism 
~ Free Printable Color Wheels
For Color Mixing 
Color Wheels for different color models
Explanation of checking value using B&W photo (images shown below)

Spinning

How to lighten a colorway at your wheel 
Come to terms with your spinning fiber stash  
Fractal spinning 
Gradient fractal spinning 
Choosing colors for a sweater 
Influencing a combo spin (pdf)

Spinning from the fold:

Mixing fiber for a sweater combo spin:

And a follow-up combo spin video from The PassioKnit Spinner:

Books & Magazines

Color in Spinning by Deb Menz

Dyeing to Spin & Knit by Felicia Lo

Yarnitecture by Jillian Moreno

PLY Magazine – Autumn 2013, Color issue (digital or print)

Spin Off magazine articles include:

• Coordinating Handpaints by Debbie Held – Winter 2017 (digital or print)
• Spinning Color by Felicia Lo – Spring 2017 (digital or print)
• Challenge accepted! by Maggie Casey – Summer 2017 (digital or print)