Chanel Beige Ardent (237) is a warm plum with a pearl finish that is limited edition and retails for $45.00. In comparison, ColourPop C'mon Sis is a warm plum with a satin finish that is limited edition and retails for $10.00.
ColourPop C'mon Sis is 90% similar — it is less shimmery, lighter, cooler.