If you like the color a lot, ask your paint store to mix it a shade lighter.

I had Seal Gray mixed by BM for my livingroom. It went on so well that I had more than a gallon and a half left so I had the extra gallon lightened two shades and used it in a bathroom. Here are pics of seal gray in my livingroom and a custom lightened version in my powder room.So if you already have the seal gray you can have the store lighten it for you.