[rxzv]

I know I can google it, but is there a particular link you recommend to read up on it?

[arketyp]

As it happens I was just researching it myself (it was briefly mentioned in a lecture on scientific visualization). I found this (have not read yet), what seems like a thorough and serious treatment of the subject.

http://www.handprint.com/HP/WCL/color2.html#heringtheory