Re: [pygame] "Making Games with Python & Pygame" free book

[Christopher Night <cosmologicon@xxxxxxxxx>]

It's complicated, but  red, yellow, and blue are a "good enough" set of primary colors that they were used for a long time. CMYK is superior, but neither of them can reproduce every color that the human eye can see. Neither can RGB light, for that matter.

http://en.wikipedia.org/wiki/RYB_color_model

-Christopher

On Mon, Mar 19, 2012 at 3:02 PM, Russell Jones <russell.jones@xxxxxxxxx> wrote:

I'm pretty sure that's not the whole story as pigments are subtractive whilst light is additive. One can't take red, green and blue paint and make any colour. IIRC.

Russell

On 19 March 2012 16:10, Ian Mallett <geometrian@xxxxxxxxx> wrote:

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?

Russell

There is a "color space" that defines all possible colors.  "Primary colors" are the colors we choose as basis vectors.  Both 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.

Ian