A Tone Color
Every color tone is decided by refracting angles and every sound is also decided by the number of vibration. As a result, as the relation of angles and pitches is the same, the similarity is clear. However, the likeness doesn’t belong to sensation but reason.
Each sense organ has his own domain. The domain of music is time and that of painting is space. Repeating sounds or developing colors is a matter to change structures. It means you put ears in the place of eyes and a contrary concept.
Colors exist continually but sounds disappear. Therefore anyone couldn’t make sure that a faded sound is the same as a new sound. Each sound is relative and it can be just distinguished by comparison. However colors aren’t made up by relation. Yellow color is just yellow without relation with red color. Each color is absolute and independent.