• In music, chromatic indicates the inclusion of notes not in the prevailing scale and is also used for those notes themselves (Shir-Cliff et al 1965, p.17). See chromatic scale, total chromatic, twelve tone technique, serialism, twelve tone equal temperament, chromatic sequence.
• In optics, see Chromatic aberration
• For chroma, see color
• Chromatic is the title of a CD by Swiss hip hop group Sens Unik

Source

• Shir-Cliff et al (1965). Chromatic Harmony. New York, The Free Press.