The website Dimensions of Colour by David Briggs is based on material taught at the Julian Ashton Art School, Sydney, Australia, made available for all of us to learn.
FOREWORD: COLOUR THEORY MADE DIFFICULT yet paraphrasing a gentleman but no more than necessary. Artists from all fields who use colour, oils, pastels, room decore, computer jockeys, ought to know more. If David is right, implying it has been criticised as too difficult and too simple, must be about right.
I didn’t know how fundamental Newton has been, inventing the concept of the colour wheel, is history here too.
I came across the site during investigation of colour space after hitting trouble in implementing HSL/HSI/HSV Uncle Tom and finding things are a mess. Change of tack, going to try proper matrix operations instead.
Best of luck.
Click the image or here. (both open in new window)