Actually there are only 3 options under the Color note in the Midi Editor (Part, Pitch and Velocity).
It would be great if we can colorize the notes according to the chord track (like cubase).
==> The note events get different colors depending on whether they match the current chord in the chord track.
==> Color note according to the Chords in the chord track or to the scale.
==> So 4 options would be great ==> Part, Pitch, Velocity, Scale and Chords