Pleasant Valley from Benjamin Moore is one of the most versatile & popular colors out there. It has a perfect mix of warm/cool tones in the gorgeous blue/gray color, so it works with almost anything. Also looks stunning in a lot of lighting situations.
Benjamin Moore Palladian blue said to be the most beautiful color as it changes with the angle of the light all day long. It is peaceful, flattering and not pastel. Its a grayed down, robin's egg blue.