Jazz theory of diatonic (inside) harmony using chord scales.

Jazz Harmony from Scales

Triads formed using only notes in the major & minor scales

Triads that are formed on degrees I, IV and V are major. Those formed on
degrees II, III and VI are minor & the triad formed on degree VII is diminished.

Natural Minor Scale

Triads that are formed on degrees I, IV and V are minor. The triad formed
on degree II is diminished & those formed on degrees III, VI and VII are major.

Melodic Minor Scale

Triads that are formed on degrees I and II are minor. The triad formed on
degree III is augmented, those triads formed on degrees IV and V are major
& degrees VI and VII triads are diminished.

Harmonic Minor Scale

Triads that are formed on degrees I and IV are minor. Those formed on
degrees II and VII are diminished, the triad formed on degree III is
augmented & those formed on degrees V and VI are major.

Also see Jazz Chords Chart