6:5 · 3 semitones
Minor third. Overcharged by about 16 cents.
- Pure
- 315.64¢
- Tempered
- 300¢
- Charge
- −15.64¢
- Beat
- 2.37 Hz
Lower note 220 Hz. Pure upper 264.00 Hz. Tempered upper 261.63 Hz.
The tempered minor third is about 15.6 cents narrower than 6:5, a slightly larger error than the major third's and in the other direction.
The two notes beat about 2.4 times a second on this lower note, against the major third's 2.2. Whether that reads as dark or merely different is taste; the 15.64 cents is arithmetic. Minor third (Wikipedia, CC BY-SA).