Do, re, mi, fa, sol, la, si... Red, Orange, Yellow, Green, Blue, Deep-Blue, Violet...
Perhaps visually the musical scores containing colors instead of complicated note characters would be easier to master and to understand, plus quicker to read. Flat/sharp would be expressed through color depth/brightness; duration through arabic numbers. Octaves would be marked with Greek numbers.
In addition the strings/keys of musical instruments would be colored correspondingly so everyone could play the scores, easily reading the octaves and the color-notes.
Dynamic light-music could also be played on the basis of this principle, making concerts great feasts of light and sound

ps: pity such scored would not be available to the minority of color-blind people.