OPI GelColor is gel nail polish with a thin, brush-on formula designed for high performance and a glossier finish compared to a regualr nail polish. Design house: OPI. Gender: Ladies. Category: Nails. Collection: Gel Nail Polish. SubType: Polish Gel. Beauty group: Nails. Size: 0.5 oz. Color: Stay Classic. Barcode: 3616300769997. Base Coat. OPI Ladies Gel Nail Polish Gel 0.5 oz Stay Classic Nails 3616300769997.