The B-flat diminished chord (B♭°) is a three-note chord consisting of the notes B♭, D♭, and F♭. It is constructed by stacking two minor thirds on top of the root, creating a diminished triad that has a tense and unstable quality. This chord is commonly used in classical, jazz, and contemporary music to evoke suspense, drama, or a sense of impending resolution. The B-flat diminished chord often functions as a passing chord or a leading-tone chord, adding tension that naturally resolves to a more stable harmony, and its unique, dissonant sound makes it a versatile tool for composers and performers seeking expressive harmonic color.
Name: B-flat diminished chord
Symnonyms:: B-flat diminished triad
Notes: B♭, D♭, F♭
Intervals: 1, ♭3, ♭5
Chord symbol: B♭o
Alternative symbols: B♭dim, B♭m(♭5), B♭m♭5
Type: Triad (three-note chord)
B-flat diminished chord on the Staff
B-flat diminished chord on Piano
B-flat diminished chord on Guitar
B-flat diminished chord on Ukulele
Rowan Ellis is a musician and educator with a passion for exploring the language of harmony and melody. With years of experience across classical, jazz, and contemporary styles, Rowan breaks down music theory into clear, practical insights. His goal is to make chords and scales less intimidating and more inspiring for every musician.