bIII roman degree
The flat third major — in a minor key it's the relative major, a ray of light out of the gloom; borrowed in a major key, a bright, surprising turn.
Where it lives
3semitones from the tonic
Major mode
major triad
3semitones from the tonic
Minor mode
major triad
Hear it in context: i-bVI-bIII-bVII
Piano sound loads on first tap. Resolved in the key of C — every chord links to its full analysis.