I guess it adds up to why you want to know.
If you're a scientist, then white is the reflection of all colour, and black is the absorption of all colour.
But to a quilter, white is a colour.
To a laundry worker, white is a goal.
To an old woman, white hair is a crown well earned.
It's all in the context.
But I do like the smoothie idea. Can mine have blueberries in it?