All the rooms in my house are painted in this colour. I love it. It changes throughout the house depending on light. In brighter spaces it's a creamy grey. In shadows it's got a very slight steely undertone.
North facing rooms are a joy to decorate because the quality of light allows one to use both warm and cool colours. All colours will look good. In order to maximise the feeling of light it is best to use a less coloured palette – pale tones for a light and airy space. Warm greys like Elephant’s Breath and Skimming Stones are very popular as they are easier to live with than the more definite greys.