What is chromaticism and how did romantic period composers use it?

Chromaticism refers to the use of notes outside the traditional diatonic scale, incorporating all twelve pitches within an octave to create richer harmonic textures and emotional depth. During the Romantic period, composers like Chopin, Wagner, and Liszt employed chromaticism to evoke intense feelings, enhance dramatic tension, and expand harmonic language beyond classical constraints. This technique allowed for greater expressiveness in their music, often reflecting the era's emphasis on individual emotion and complexity. As a result, chromaticism became a hallmark of Romantic music, paving the way for future developments in Western Classical Music.