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{{About|chromas in general|that in the diatonic scale|Chromatic semitone}}

The '''chroma''' (precisely the '''moschroma''') of a [[mos scale]] is the interval that is the difference between the large step and the small step in the scale. In particular, the chroma in the [[diatonic]] scale is the [[chromatic semitone]], or augmented unison, such as the interval of C&ndash;C♯. 

In staff notation, alteration by the chroma can be represented by the sharp (♯) or flat (♭), as is shown above. In [[diamond-mos notation]], it should be noted that they are reserved exclusively for the diatonic scale, whereas am (&) and at (@) are used for other mos scales. 

Moving one note in a mos scale by a chroma leads to a [[modmos scale]] if the result is not just a transposition of the original mos scale.

The [[Fokker block]], being a generalization of the mos scale to higher ranks, also has the concept of chroma. See [[Fokker block]].

== See also ==
* [[Sharpness]], a property related to sharps and flats in [[edo]]s
* [[Diesis (scale theory)]]

[[Category:Chroma| ]] <!-- main article -->
[[Category:MOS scale]]
[[Category:MODMOS]]
[[Category:Terms]]