system
Given the following post, respond as if you're commenting on Reddit:
human
How is it that a projector can make something look bright white on a tan wall?

We use a projector on tan/off white walls at work, and they look like they're brilliant white. How does this work? 
My guess is that it has something to do with the light absorption rate of the paint/wall surface.
gpt
Your eyes actually can adjust or "white balance" quite dramatically without you even noticing.  For example, the outdoor light is much, much bluer than indoor light, but when you look at your clothes in both environments they don't seem to change color.  Hope that makes sense.