The Fundamental Scales —illustrated book for piano beginners

⁍ Across the range, each set of tones gives rise to a certain tonal domain — within which scales can be built using any pattern. ⁍ For indexation purposes, these labels are mapped to the ROYGBIV color sequence — red for Aeolian, orange for Locrian, yellow for Ionian, green for Dorian, blue for Phrygian, indigo for Lydian, and violet for Mixolydian.