Chanel launched its Illusion D'Ombre range last year and this one is called "Epatant" 84. It's a khaki silver-pewter with lots of metallic shimmer. As it's one of those cream-powder hybrids it has a bouncy gel texture, once swatched you see the (very) metallic sheen which is stunning, it's also incredibly pigmented. This is a very wearable shade- looks great alone, layered underneath powder eyeshadows or as a smoky eye.
I find these last all day on me even with out a base and as they're so creamy it's very easy to blend out. While they are at a higher price point to Mac they are long lasting and a dream to apply so I think well worth the investment.