MAC Aquadisiac Eyeshadow ($18 Cdn) is a deep sea turquoise with a lustre finish. It is one of the more flattering and wearable blues out there for me. The pigmentation is amazing and even though it is a lustre finish, there is no fall out or chalkiness. I really love doing eye looks with this one to wear with turquoise clothes. It actually comes across as a candied jewel tone shade of turquoise, which is what I love about this shade. It is pretty, but never overpowering or clownish. Definitely worth a look if you are in the market for blue eyeshadows.