white

5. If I say a piece of paper is pure white, and if snow placed next to it then appeared grey, in its normal surroundings I would still be right in calling it white and not light grey. It could be that I use a more refined concept of white in, say, a laboratory (where, for example, I also use a more refined concept of precise determination of time).

Ludwig Wittgenstein / Remarks on Color / from 1 to 350