A Harmonic Major Scale Notes

Degree	Name	Note	Interval
1	Tonic	A4	P1
2	Supertonic	B4	M2
3	Mediant	C#5	M3
4	Subdominant	D5	P4
5	Dominant	E5	P5
6	Submediant	F5	m6
7	Leading Tone	G#5	M7
8	Octave	A5	—

Key Signature

The key of A Harmonic Major Scale has 3 sharps: F♯, C♯, G♯.

F♯C♯G♯

Parallel key: A Minor Scale — same root note, opposite mode. See also the A Minor Chord.

Relative key: F# Minor Scale — shares the same key signature. See also the F# Minor Chord.

These are the diatonic triads built on each degree of the A Harmonic Major Scale:

Degree	Numeral	Chord	Quality
1	I	A Major	Major
2	ii	B Minor	Minor
3	iii	C# Minor	Minor
4	IV	D Major	Major
5	V	E Major	Major
6	vi	F# Minor	Minor
7	vii°	G# Diminished	Diminished