bIII+ roman degree
The augmented flat third — bIII with a raised 5th, a bright tension that often leads chromatically toward the dominant in a minor key.
Where it lives
3semitones from the tonic
Minor mode
augmented
Hear it in context: i-bIII+-bVI-V
Piano sound loads on first tap. Resolved in the key of C — every chord links to its full analysis.