I gave my copy of a Color Grid card to a quilter. It did help to choose colors, but they felt too predictable. Ì think that I would prefer a Color Wheel. I realize certain rules will make winning color combinations. I still like an element of surprise, an unexpected color added to the combination..
Have you woven a project with an unexpected color added in?
Side note. Queezle, did you grab any new colors to try, while visiting in Austin for your work? It is a city of handcrafters, along with musicians.