Kandinsky is one of the most influential artists of the 20th century - and the founder of abstract painting.
Born in Russia, he initially trained as a lawyer and economist - before turning to painting when he was 30 years old.
Kandinsky could not understand why artists should be figurative.
One day he was struck by one of Monet's paintings of haystacks.
He didn't know what they were - and yet found them beautiful.
He drew the parallel with music, arguing that musicians, unlike painters or sculptors, were not expected to imitate real-life.
Couldn't these same principles be applied to painting?
Art did not have to be figurative to be beautiful.
Abstract art could be as powerful, if not more powerful, than figurative painting.
Yellow-Red-Blue is inspired by German writer Goethe's account of the birth of red.
Red is explained as the meeting of Yellow / Light and Blue / Darkness.