Deborah Lippmann Moon Rendezvous Nail Lacquer ($17.00 for 0.50 fl. oz.) is described as a “faded slate-blue shimmer.” It’s a muted, cool-toned blue shot through with silver and icy blue shimmer. There’s a definite gray-ish cast to it that gives it that “slate-blue” coloring as described. I thought the finish was more metallic than shimmer, though. Butter London Lady Muck has a completely different finish, and it looks a bit bluer because it has less shimmer/sheen. Rescue Beauty Lounge Concrete Jungle is a cream, but it has a similar gray-blue coloring.