Natasha Denona Limoncello (169M) is a warm yellow with a metallic finish that is limited edition and retails for $29.00. In comparison, ColourPop Sandy (Pineapple Cake) is a warm yellow with a metallic finish that is limited edition and retails for $4.50.
ColourPop Sandy (Pineapple Cake) is 90% similar — it is more shimmery, lighter.