Visual System: what signals the Millions of Colors

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neurocomp2003
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Where in the visual system does one begin to recognize the millions of Colors in the visual spectrum? Do the retinal cells differentiate between them?
Or are generic signals carried to the Color Zones(??V4??/IT) where they are differentiated?

How would one convert (256,256,256) pixel colors to on/off rods and cones?
 
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neurocomp2003 said:
Where in the visual system does one begin to recognize the millions of Colors in the visual spectrum? Do the retinal cells differentiate between them?
Or are generic signals carried to the Color Zones(??V4??/IT) where they are differentiated?

How would one convert (256,256,256) pixel colors to on/off rods and cones?

You're right to include the rods with cones when discussing colour processing and recognition in the brain because, just recently, rods were shown to discern colour while also processing black and white (light and dark) stimulus.

There are three cortical stages of colour processing in the human brain (S Zeki, L Marini)

http://brain.oxfordjournals.org/cgi/reprint/121/9/1669.pdf