14:18:21, a supermajor triad or septimal major triad, is a triad in the 7-limit sometimes used in place of a major triad.

Chord information
Harmonics 14:18:21
Subharmonics 1/(9:7:6)
Intervals from root 1/19/73/2
Cents from root 435¢702¢
Step intervals 9/7, 7/6
Step cents 435¢, 267¢
Color name ru or r
Prime limit 7
Genus 327 (63)
Intervallic odd limit 9
Otonal odd limit 21
Utonal odd limit 9
Consistent edos (d ≥ 2) 5edo*, 14edo*, 17edo*, 19edo*, …