When emotions run high, they take on a red colour. Reddening of the face communicates passion, nervousness, the swell of feeling, the pounding of the heart. Red conveys emotional intensity even when abstracted. Artists often combine it with form and surface to express charged emotional states.
Pellan

Alfred Pellan Young Girl in Blue Dress, 1941 © Estate of Alfred Pellan / SODRAC
Letendre

Rita Letendre Tension on Black, 1963
Pratt
Mary Pratt Red Current Jelly, 1972 © Mary Pratt
Tousignant

Claude Tousignant Paranoid, 1956 © Claude Tousignant
Beam

Carl Beam
The North American Iceberg, 1985