allyourpixel

We all know that the human visual system is remarkably adaptive, but here's an illusion that might surprise you (it surprised me). In the illustration below, the squares marked "A" and "B" are the same shade of gray. Crazy, huh?

That's why, when creating graphics, it's very important to use a software application that provides a neutral (preferably dark) visual environment. Otherwise it's hard to be precise about the color of your work.