Piet Mondrian, Lozenge Composition with Yellow, Black, Blue, Red, and Gray, 1921, Oil on canvas, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/109819

Piet Mondrian, Composition with Red, Yellow, and Blue, 1927, oil on canvas, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/143278