
Wassily Kandinsky
The Russian pioneer of abstract painting who taught at the Bauhaus and was sure the triangle was yellow.
Books
Concerning the Spiritual in Art1911His short manifesto for abstract painting, on how colors and forms work on the soul.
Mentioned in

How do you paint loneliness?
How do you paint sadness and loneliness with no face and no symbol? From Bruegel’s Icarus to Picasso’s blue and Friedrich’s ship, and why every viewer finishes a painting with their own life.