Kathy - checking the color is right with a sample of the paint is a good idea. One great development is the paint manufacturers making smaller jars of test paint. Benjamin Moore offers this for about 100 or so of their colors. Ralph Lauren also had small sizes at Home Depot. Unfortunately, the colors I was agonizing over are not ones that come in the smaller size.
You can always get a quart mixed to check the color in your own place. This then brings up reason #2 I hate picking out paint colors. If you learn it's not the right color, then you have the hassle of disposing of the unused paint.
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