B♭dim
Diminished · B♭ – D♭ – F♭
- B♭R
- D♭m3
- F♭♭5
Guitar voicings
Piano
- Root
- Third / sus
- Fifth
- Sixth / seventh
- Extension
About the B♭dim chord
The B♭dim chord (Diminished) is built from B♭ (the root), D♭ (a minor third) and F♭ (a diminished fifth). Diminished triads are tense and unstable, often used as passing chords between stronger harmonies.