400/399, the devichroma is a 19-limit (also 220.127.116.11.19 subgroup) superparticular comma of about 4.33 cents. It is the difference between undevicesimal chroma, 20/19 and large septimal chroma, 21/20. By tempering it out is defined the devichromic temperament, which enables the devichromic chords.
The name devichroma was named by Xenllium in 2023. It is a contraction of undevicesimal chroma into a single word.