The scale’s notes are numbered from 1 to 7. Roman numerals are used to label the basic triad (1-3-5) chords built on each of those notes.

D Major

Chords in the key of

The notes of the D major scale are:

D – E – F# – G – A – B – C#

Key of D major

I ii iii IV V vi vii°
D Em F#m G A Bm C#dim
D major E minor F# minor G major A major B minor C# diminished
D - F# - A E - G - B F# - A - C# G - B - D A - C# - E B - D - F# C# - E - G

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That’s the diatonic set. If you stay strictly inside the key, these are your friends. The pattern of naming chords for every major key is:

Major, Minor, Minor, Major, Major, Minor, Diminished. Numerals in UPPERCASE (I, IV, V) denote major chords, and numerals in lowercase (ii, iii, vi) denote minor chords.

D Major: Extended Chords

Dmaj7
D - F# - A - C#

Gmaj7
G - B - D - G

A7
A - D- E - G

Em7
E - G - B - D

Bm7
B - D - F# - A

C Major
C - E - G

D Major’s Parallel Minor

Changing between parallel keys can feel bold, emotional, and cinematic.

These notes come from the D natural minor scale (F, B♭, and C), and are commonly borrowed individually to colour chords in D major:

Parallel Minor: D major yoinks from D minor

♭III iv v ♭VI ♭VII
F Gm Am B♭ C
F major G minor A minor B♭ major C major
F - A - C G - B♭ - D A - C - E B♭ - D - F♮ C♮ - E - G

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