Chanel Bel-Argus (667) Le Vernis Nail Colour ($27.00 for 0.40 fl. oz.) is described as a “metallic blue.” It’s a rich, medium-dark blue with a metallic finish. It has a lot of dimension and gets lighter and darker depending on the angle you hold your nails and what kind of lighting there is. I could only come up with one shade that was similar, but it is surprisingly similar: China Glaze Blue Bells, which ends up having a more foil-like finish, while Bel-Argus is very metallic.