Picasso had a blue period.
The blues is a genre of music that takes its name from an emotional state.
Mild depression is a case of the blues. The cure is to sit on your stoop and play a guitar.
Beginning sometime around World War I, blue started to be associated with being a boy.
Shades of blue have wavelengths between 380nm and 500nm.
Pyroflatulence or flatus ignition (setting light to your farts) is commonly known as a blue angel.
Becoming a blue man can take from 10 weeks to 2 years. However, if you’re in a hurry, you can become a blue man by falling through ice in the middle of winter.