Why don't you stay behind

Why does the color blue have such a negative connotation? When someone is sad, why are they not pink or brown or turquoise or cyan? Why blue? When I think of things that are blue (actual blue, not metaphorical blue) I think of the sky and the sea. True, both of these things are vast and daunting to from human perspective, but not in a negative sense. Huge bodies of water provide an opportunity for adventure, a place to discover what lies at the horizon and what awaits us beyond. So too does the sky, because its blueness represents a barrier between the familiar ground and the mysterious yet exciting outer universe. Where is this link between adventure and sadness?

Perhaps the reason that the unifying factor for the two greatest archetypes of mystery has adapted to represent gloom is because people fear the unknown. We like to stay put and enjoy our routines. We wake up to a blue sky and fall asleep under the same hue, accepting its consistency with no desire to know what lies beyond it. Or, perhaps, it is just the opposite of that. Maybe we all long for the adventure that lies beyond the sea and the sky but have become so tied down with our routines to be able to venture past them. Perhaps we are all so "blue" because we are forced to accept the horizon and the sky as the end of our perception. At least, that's how I feel. The color blue does not make me "blue" but not knowing what comes after it certainly does.

Just to stretch the metaphor slightly further, I want to see the world's purple. I have seen the red and orange of the flame, the yellow of the sun, the green of the trees and, obviously, the blue. But what in nature is purple? Perhaps we can find it just beyond the blue. Perhaps past the sky and beyond the horizon, there is something new, something purple for me to discover. Not seeing purple, that is what makes me most blue.