The "color" of a thing is pure perception and often just a genuine personal choice.
It is annoying to think about it like that, but consider:
A movie projected onto a white canvas. Before the movie starts, there is no light projecting onto it and it's just the white canvas.
The movie opening credit comes on. "ALIEN" it says in thin white letters on black background. The projector does not darken the canvas, just add some lines of light forming letters in the middle. Yet we see black.
Is the canvas black or white now? If do when did it change? Is it both? How would you describe that?
People give many answers to this. Most of them based on choice of definition more than objective observation, which I find super interesting.