Blue, azure, cyan, indigo, ultramarine. It's there. You see it in the sky, on the ground, or maybe even in your own eyes. The symbol of faith, virginity, and cleanliness.

Your favorite rough cotton pants might be blue. Indigo dye is 6,000 years old. Up until fairly recently, it was still considered a luxury.

Skin can be blue. Argyria is a disorder caused by an overexposure to silver, and makes the skin turn blue.

Dye from blue gatorade can help heal spine injuries.

Once in a blue moon. Something you’ve rarely seen, or probably never will.

The ocean is blue. Or green sometimes. Maybe even red.

A high energy wavelength.

Blue is for boys.

Your favorite social media sites are blue. Facebook, Twitter, Tumblr.

Maybe Blue Velvet is your favorite movie.

Maybe Bluebell is the ice cream from your childhood.

Maybe you watched Blue’s Clues. One fish, two fish, red fish, blue fish. A primary color.

Maybe this blue glass is made of Cobalt. If it’s a diamond it’s made of cobalt. It’s an abnormality which becomes a symbol of hope.

Or maybe blue skies are the days the drones strike.

The unread articles on google are blue.

I’m concerned about the blueberries.

Maybe it’s your favorite Joni Mitchell album.

Maybe Bluegrass is your favorite genre.

Notebook lines are blue.

Bruises are blue. Veins are blue.

Your country has blue in its flag. Blue lives matter.

You couldn't live without bluetooth.

Your cheese is blue.

You you're rich and royal. Or just working class.

You just got the first place ribbon.

The green screen's ugly twin.

You're a democrat.

Maybe it’s just your favorite color.

Forgive me if I've forgotten some. No matter who you are, or where you are from, you’ve heard of blue. Maybe you’ve never seen it yourself, but people you know have. Or maybe you’ve had the pleasure yourself. Maybe you don't like it anyway. There’s never one answer, even to such a simple question. What does it mean to you?