Artist and elder brother of Bernard Cohen, Harold was born in London studying at the Slade School, and then lecturing art history at Camberwell School of Art from 1952-4. Visiting the USA from 1859-61, Cohen returned to the UK and abandoned his committment to Abstract Expressionism. Choosing to work with a palette of stripes and colored structures, his work empasized mark making and drawing before in the mid 1960's, color began to take on significance in the form of fields of dots juxtaposed on neutral backgrounds. Cohen moved to the US in 1969 to work at the University of California, and has been the Director of Art Science Studies since 1974. Since being in the US he has used computers both to create art work and to decipher the problem of color relationships.