ColourPop Roy G Biv is a warm pink with a metallic finish that is limited edition and retails for $6.00. In comparison, ColourPop Estrella (She's Got Solstice) is a warm pink with a frost finish that is limited edition and retails for $4.50.
ColourPop Estrella (She's Got Solstice) is 85% similar — it is less shimmery, warmer.
