a promise of lightning

“Sun-whipped seas, spices and fragrant trees,”

The power of profound meaning is found in blue, and first in its physical movements (1) of retreat from the spectator, (2) of turning in upon its own centre. The inclination of blue to depth is so strong that its inner appeal is stronger when its shade is deeper. Blue is the typical heavenly colour. The ultimate feeling it creates is one of rest. When it sinks almost to black, it echoes a grief that is hardly human. When it rises towards white, a movement little suited to it, its appeal to men grows weaker and more distant. In music a light blue is like a flute, a darker blue a cello; a still darker a thunderous double bass; and the darkest blue of all—an organ.