"Chroma means color so it is pretty much all the 12 colors of music!To keep it simple you only need to remember two things:1) Notes go from A to G#, before they repeat.2) There is a sharp (#) between all the letters except between B and C, or between E and F.So, we get:A, A#, B, C, C#, D, D#, E, F, F#, G, G#, A no sharp no sharp between between OCTAVE B and C E and FWhen you have gone the distance f" . . . . .