what is white color in GetPixel() method? [on hold]

as you can see from topic I just have a very simple question:

what is the RBG value of white color in GetPixel() method?
is it 255 255 255?
or 0 0 0?

TNX

White = 255 255 255

Black = 0 0 0

There’s an effortless code to check it