Well, lately (I m almost 67, female, in good health) when I take an afternoon nap in my recliner, when I wake up, for a few brief seconds, I will see the walls in a different color. My walls are a mocha color; I have see a light green, a yellow, a light blue. It is the strangest thing. It goes away within about two seconds and then color is right again. Sorry. I did not know this cost money. No thanks.