Rouge, also called blush, is a cosmetic used to color the cheeks. It is applied as a powder, cream or liquid. Don't use this tag for naturally blushing cheeks. Generally rouge is drawn more toward the ears while a blush is drawn below or closer to the eyes. If a character isn't wearing other types of makeup like lipstick, mascara or eyeshadow then it's probably just an average anime blush and not rouge.