Natasha Denona Blue Dahlia (181DC) is a cool purple with a metallic finish that is limited edition and retails for $29.00. In comparison, Sleek MakeUP Simbad's Seas is a cool purple with a frost finish that is limited edition and retails for $9.99.
Sleek MakeUP Simbad's Seas is 95% similar — it is cooler.