On Mon, Mar 19, 2012 at 9:49 AM, Russell Jones <russell.jones@xxxxxxxxx> wrote:Great news :) I liked IYOCGwP and have mentioned it here before now.BTW, on page 34 of the new book you write "(Red, blue, and yellow are the primary colors for paints and pigments, but the computer monitor uses light, not paint.)"The primary colours for pigment and paint are cyan, yellow and magenta, no?RussellThere is a "color space" that defines all possible colors. Â"Primary colors" are the colors we choose as basis vectors. ÂBoth red-blue-yellow and cyan-magenta-yellow are valid basis vectors; the former more often used in painting, the latter more often used in printing.IanÂ