Because color has lost its permanent form in certain media such as computer displays, there is a need for some overriding organizational principle. In earlier work on orphics, this author has discussed some ideas and techniques for the fluid articulation of color in space and time without relying on a preferred color order. In this article the possibility of defining a sequence of colors arranged in a unique order, that is, general enough to serve as a tuning for the composition of color in space and time, is discussed. To gain as wide a perspective as possible, color vision theories and their relevance are discussed, as well as the structural compatibilities between color orders and the well-tempered musical scale. Finally the works of two artists, Morgan Russell and Robert Delaunay, are examined.