CoverGirl Sapphire Flare (315) is a cool blue with a frost finish that is limited edition and retails for $4.99. In comparison, Milani Bella Cobalt (25) is a cool blue with a frost finish that is permanent and retails for $4.49.
Milani Bella Cobalt (25) is 85% similar — it is more shimmery, lighter, more muted.