 The claim, here, is that what it is like to for something to look red is more similar to what it is like for something to look orange than it is to what it is like for something to look blue. This solution, however, raises the question of what features of the experience are relevant ones, i.e., are the features which stand in the relations of similarity and difference. There seem to be two possibilities: (i) they are features of the experiences themselves; (ii) they are features presented in experience or represented in them, i.e., they are features of regions of visual fields, or of sensa, or of material objects. There are some prima facie problems which ensue. Assuming the former possibility, then our color experiences involve massive error. The judgments of similarity and difference are applied to the colors and not to our experiences. If the second possibility is adopted, i.e., it is held that there are certain features, presented in, or represented in, experience, then they stand in the relations of similarities and differences. These features are different from reflectances, so the color physicalist needs to say what they are.