In art theory, feelings are often associated with colour. Picasso, perhaps more than any other artist, embodies this in his work. His Blue Period was a manifestation of grief at the loss of a friend to suicide. For the next 3 years, his depictions of those he saw as clinging to the fringes of society were imbued with a ghostly blue wash of despair. Later in life, in happier times, he spoke of spending days walking through the verdant forests outside Paris, until he was so 'full of green' that he had to rid himself of it in a painting.