MAC Tide 'n' Seek (Magic in Your Eyes) is a cool taupe with a metallic finish that is limited edition and retails for $20.00. In comparison, NARS Quai des Brumes (Left) is a warm purple with a frost finish that is discontinued and retails for $25.00.
NARS Quai des Brumes (Left) is 85% similar — it is more muted, warmer.