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