Have you ever picked a color from the myriad of paint samples available, put it on the wall and decided that it was all wrong? It shouldn't have to be that difficult but trying to pick the perfect color from those little swatches is just not that easy.
Painters and decorators suggest you buy a small amount of the colors you're considering. Your paint store should be able to mix them in any brand and any color. Once it's on the wall, it will be easy to determine if it needs to be lighter or darker or if it's completely wrong.
Take them home and paint a 2' x 2' area on the wall. If you're concerned about testing the colors on your wall, you can paint some sample boards that can be easily moved around to see how they'll look with the furniture, floors and other items in the room.
Instead of guessing what it's going to look like, you'll actually see how it looks during different times of the day, in natural and artificial light.
While $30 to $40 a gallon for paint may seem like a lot of money, the cost in time and labor to put it on the wall is even more. It's worth taking the time to test the color on the wall before you buy all the paint needed