15:18:21:25

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Chord information
Harmonics 15:18:21:25
Subharmonics 1/(210:175:150:126)
Intervals from root 1/1 – 6/5 – 7/5 – 5/3
Cents from root 0¢ 316¢ 583¢ 884¢
Step intervals 6/5, 7/6, 25/21
Step cents 316¢, 267¢, 302¢
Color names gu yo-6 zogu-5
or g,y6(zg5)
Prime limit 7
Genus 32 ⋅ 52 ⋅ 7 (1575)
Intervallic odd limit 25
Otonal odd limit 25
Utonal odd limit 175

15:18:21:25 is a condissonant diminished seventh chord.

In diminished temperament, the 25-odd-limit intervals within this chord are tempered together with 7-odd-limit intervals, resulting in a 7-odd-limit essentially tempered chord.