Tracked by Evreward since 2020, Baseblue Cosmetics offers coupons and cash back rebates, with savings as high as 15% off. Baseblue Cosmetics discount coupons are infrequent, only available a couple times per year. Even when Baseblue Cosmetics doesn't have a coupon, you can always get up to 4% cash back, and other great rewards, with every purchase.