1. A system for generating electronic signals representing an original color video image for display in a conventional video signal color display device such as a television receiver, said system comprising: means for producing said electronic signals for display in response to color value input signals; first memory means coupled to said signals producing means and having first memory elements, said first memory elements being constrained to store only a representation of a single preselectable color value for display; second memory means coupled to said first memory means and through said first memory means to said electronic signals producing means, said second memory means having second memory elements, said second memory elements corresponding to matrix locations of said video image, said memory elements being constrained to store only a representation of a single preselected matrix image value which designates a single one of said first memory locations; and cursor means for manually generating said matrix image values in said second memory means independently of said color values such that each one of said image matrix locations is assigned a color value by reference to said first memory locations.