Ask HN: Why the apple color is white on Mac book?

The light on Macbook Pros is just the other side of the backlight on the screen. If it was red or green, the screen would also be red or green.

This also means you set the brightness of the screen to zero, then get a torch, shine it through the apple on the back, and see what is on a small portion of the screen.

You could use a colored lense to filter the backlight output delivering any color even with a white backlight.

It's a design decision. Of course it could have been red or green but those colours simply don't look as good together with silver / metallic grey.

It's no longer white on the 2016s

I think you should clarify and mention that it doesn't glow at all. As a side note this is rather easy to google the OPs question that is.