Did you know that sometimes people hear colors and smell sounds? It is called synesthesia and is caused by crossed circuitry in the brain.
Did you know that you partially see with your ears? Your inner ear gives you a sense of balance. When that sense is adversely affected everything you see seems to be spinning even though you know that it isn't.
Did you know that there are less than 20 words in English that have no rhyming words? Four of them are names of colors; orange, purple, silver and olive.
Did you know that color additive E120 is a red coloring that is made from the crushed bodies of the cochineal beetle? This same red coloring is used in Cherry Coke.
Did you ever think about how color is used descriptively in our everyday conversation? We might say we have the blues, refer to something rare as happening once in a blue moon, experience a blue Monday, know someone with blue blood, and be the winner of a blue ribbon. How about red-hot, red-handed, painting the town red, calling someone a redneck or being so mad you see red? You could be green with envy or have a green thumb or be a greenhorn.