We had the inside walls of our house repainted last year. I knew I wanted every room the same color. The very pale green I chose changes colors during the day. We have a lot of windows, 34 or so and no drapes or curtains on any of them. Depending on the sunlight or not it can be pale green, light gray, or even a pale bluish. At night it looks like no color. All the trim is bright white which adds to the color changes.