It's incredibly frustrating when you spend hours analyzing minuscule paint swatches only to find out that the colour you chose looks completely different on your wall... What I like to do before selecting a paint colour is find 5 pictures online (in different rooms and houses) of the shade I like and assess whether or not it would look good in my space. The best website I've found is Decorpad (check it out here). You can narrow your search by brand or by shade.
Here are a few colours that are tried, tested and true:
1- Wedgewood Gray by Benjamin Moore
2- Dolphin Fin by Behr
4- Revere Pewter by Benjamin Moore