Imagine we lived in a world that’s all of a sudden devoid of color, but where you’re given the option to have just one object keep its original hue. Which object (and which color) would that be?

Interesting prompt. 

Surprise me with something, a colour to bump into as I walk down the monochrome street.

My little Canon Ixus does this. Bit of a gimmick, but it can be fun.