10B is D Major on the Camelot wheel — a clean, melodic major suited to vocal-led house. The shape of a transition out of 10B depends entirely on which direction you move.
The catalog is not spread evenly around the wheel, and 10B is the eleventh-most common of 24: 18,770 tracks, 4.12% of everything we hold with a key, 2.5× the 1B shelf. Its same-number flip to 10A (B Minor) lands in a room of 18,213 tracks, 1.0× thinner — worth knowing before you plan that mood change.
Set against the catalog mean, averaged over every 10B track we hold: energy a shade above (0.59 against 0.59), groove a shade above (0.68 against 0.66), and brightness measurably below (0.55 against 0.57). That is the colour of the key showing up in the measurements rather than a rule — plenty of 10B tracks sit at either extreme.
In 10B the dominant genres are Progressive House, Melodic House & Techno, and Techno (Peak Time / Driving) (Progressive House alone accounts for around 8% of the catalogue’s tracks in this key). That genre weight matters: a clockwise lift from 10B most often lands you in adjacent progressive house territory, which is why the safe move tends to feel inevitable rather than surprising.
Tracks like End of Beginning by DJO and Risk It All by Bruno Mars sit in 10B — useful reference points if you want to hear the harmonic colour of the key before planning a transition. Try mixing one of them into something in 11B or 10A and the relationship becomes audible.