Color Duo 3D Piano Kits – from the Composing in Multiple Dimensions Series code: bottom row (C3663 556) top row (C2332 558) code: orange box (root note) blue box (mode note) grey box (neutral note) green (no function note) pink (active note) code: large box (shared scale note) half-box upper (minor scale note) half-box lower (major scale note)