You hear the word expressionism. Do you think of the art movement, abstract expressionism? Abstract expressionism was a movement that peaked in the 1930s and included expressionism, abstraction and surrealism art. Abstract expressionists were artists who wanted to state their emotional and spiritual response without necessarily referring to representational subjects. (Art Fundamentals, Theory & Practice, Ocvirk, et al.)
I am a representational artist. I am also an expressionist artist. I achieve the emotional essence of my representational subjects using colours and shapes. Many comment on my use of colour. Expressionists use colour to achieve their goals.