My designer puts stripes of paints on the wall in the room you are painting. It gives you vision before you actually use the color. Buy a can of a base paint to cover the original color (maybe a white) and let it dry - maybe a 3 foot square. Put the colors you think you want in 6 inch stripes within the square. Make sure you put that square where the brightest light will hit it since the color will change. Look at in at all different times of day including night.

When I first went to paint our house several years ago, we had a country green colored carpet and I wanted a white paint with a tint of green to go with it. I picked a color called sky and the designer never said a word, but, I didn't see it in the proper light. Just bright sunlight. Well, duh, it was powder blue. I'd done much of the upstairs in it and I hated it with the greeens.