The word chromatic comes from the greek word chroma, color, and is used in music to refer to the

The word chromatic comes from the greek word chroma, color, and is used in music to refer to the chromatic scale or musical scale. The scale does have 12 pitches, in which each is considered as a semitone above or below another. So, if notes are equally-tempered in a musical scale, then that mean they are equally spaced - nondiatonic scale.