The question of how colored objects look to dichromats provokes great interest in the general public and has also generated some interest among color scientists. There are two basic kinds of answers to the question: 1) dichromats see things as having a subset of the colors seen by normal trichromats and, 2) they see things as having colors different from normal trichromats.  We review the theory and evidence and argue for an answer that fits into neither category. The discussion of color blindness necessarily involves consideration of more basic questions about the structure of color experience. We discuss these issues by focusing on the question of whether there are basic colors. In this part of the paper it will be useful to compare color vision with taste and some general conclusions about basic sensible qualities will be put forward.