Hold on. I definitely know this one.
I'm nearly certain that it's blue.
As I peered out the misty window of my agency office into the grey deluge curtaining the dirty streets outside, I turned the idea over in my mind a few more times.
For many different reasons, I missed the color blue terrifically-- all colors, at that. The world was too grey these days and only getting greyer, whether it be the grey of cloudy skies or the grey of industrial endeavor, and consequently that of industrial smog. If not for the rich velvet red worn by some of my clientele, I would fear all color to have gone out of the world altogether.
The color blue in particular, I admit.
In my moments of contemplation, the mug of coffee on my desk had slowly cooled into a more stagnant foulness, but any drink is better than none anyhow. I swung it back to keep my eyes open.
There came a knock upon the door.