Another effective use of emotive color is found in the paintings of Pablo Picasso. Between 1901 and 1904, Picasso painted in monochrome tones of blue which reflected his low psychological state. This was triggered by the death of his friend, the Spanish painter Carlos Casagemas, who shot himself because of his unrequited love for the artists' model Germaine Pichot. This chapter of his work became known as his 'blue period'. In 'The Tragedy' (1903) he uses cool blues to evoke the chill of sadness and despair in a typically gloomy subject from this period.