An anaglyph is a 3D stereo image that uses color to present both left- and right-eye views of a scene in a single image. Color filter glasses are used to direct the views to each eye. The “anaglyph problem” is, given the characteristics of the display and filters, find the color for each pixel in the anaglyph that best delivers the stereo pair. “Best” in this context is to avoid undesirable visual artifacts such as retinal rivalry and stereo crosstalk while maximizing perceived color fidelity. A vector formulation of the anaglyph problem for additive displays is presented and solutions for it that minimize rivalry and minimize crosstalk are identified. Factors such as adaptation and display range clipping are included in the solutions. Example anaglyph images using the methods described are presented.