Def 1: its a color

def 2: color of sadness

Def 3: the best fuckin song ever by Jack's Mannequin
{lyics}
I have, I have you breathing down my neck, breathing down my neck
I don't, don't know what you could possibly expect under this condition so
I'll wait, I'll wait for the ambulance to come, ambulance to come
Pick us up off the floor what did you possibly expect under this condition so
Slow down, this nights a perfect shade of

Dark blue, dark blue
Have you ever been alone in a crowded room well I'm here with you
I said the world could be burning and burning down

Dark blue, dark blue
Have you ever been alone in a crowded room well I'm here with you
I said the world could be burning 'til there's nothing but dark blue
Just dark blue

And this flood, this flood is slowly rising up, swallowing the ground
Beneath, my feet. Tell me how anybody thinks under this condition so
I'll swim, I'll swim as the water rises up sun is sinking down and now
All I can see are the planets in a row suggesting it's best that I
Slow down this nights a perfect shade of

Dark blue, dark blue
Have you ever been alone in a crowded room well I'm here with you
I said the world could be burning and burning down

Dark blue, dark blue
Have you ever been alone in a crowded room well I'm here with you
I said the world could be burning dark blue

We were boxing, we were boxing the stars
We were boxing (we were boxing) you were swinging for Mars
And then the water reached the west coast
And took the power lines, the power lines
And it was me and you (at your hotel) and the whole town underwater
There was nothing we could do
It was dark blue

Dark blue, dark blue
Have you ever been alone in a crowded room well I'm here with you
I said the world could be burning and burning down

Dark blue (dark blue...)
Have you ever been alone in a crowded room well I'm here with you
I said the world could be burning now there's nothing but dark blue

If you've ever been alone you'll know dark blue
If you've ever been alone you'll know, you'll know

Def 4: it is also a song by some other ppls with different lyrics not important

a gay relationship