A person who owns a hardware store told me that just a few companies make all the paint for the different brands. I'm not sure if that's true or not. I've used a ton of different paints. I just painted two external doors red (used gray primer) and they turned out really well with 2 coats of Valspar from Lowes.
My favorite paint ever was a Behr Premium Ultra. I got it as a mismatched color and, luckily, it was the color that I wanted to paint DS's room anyhow. It just about covered in one coat.
As a PP said, if you find a color you like, you could take it somewhere to match it.