Milani Bella Cobalt (25) is a cool blue with a frost finish that is permanent and retails for $4.49. In comparison, Sleek MakeUP Acid #6 is a cool blue with a frost finish that is permanent in palette and retails for $9.99.
Sleek MakeUP Acid #6 is 85% similar — it is more shimmery, lighter, brighter.