A series of coincidences in recent months, as I learn about different aspects of the colour blue, culminated in a wonderful, thought-provoking exhibition, “Blue - The Colour of Modernism”, currently on display at the Caixa Foundation in Palma de Mallorca. The palette of blues increased vastly in the later 19th century, and artists evoked innumerable emotions and situations with their skilful use of different shades of blue, a colour which hallmarked that era to a great degree.