What were the kinds of harmonies that Mozart used?

Mozart utilized a variety of harmonies in his compositions, including diatonic harmonies that adhered closely to the key signatures of his works. He frequently employed chromaticism to introduce tension and complexity, enhancing emotional depth. Additionally, Mozart used modulations to shift between keys, creating contrast and interest, and often integrated counterpoint, blending multiple melodic lines with rich harmonic support. His innovative use of harmony contributed to the Classical style while paving the way for future Romantic composers.