Blue, blue, blue,Blue can be a complicated color to describe. Blue is traditionally the color of both the sky and of water (especially deep water), and of various fruits and flowers, and a common eye color in humans indigenous to western Eurasia and in many species of mammals, and one of the main colors of natural beauty in general. Among humans, blue is statistically the most common personal favorite color. Blue is a very common color in flags, heraldry and politics. Blue is also a potent symbol of deep emotion, especially sadness.
Not pink or purple or yellow,
Not brown like Mister Othello,
But blue, blue, blue!
— Let 'Em Eat Cake, "Blue, Blue, Blue"