Gel Color OPI semi-permanent nail polish. Gel Color OPI are the brand's range of semi-permanent varnishes. These are used with a UV/LED lamp as well as a base and a top coat. Semi-permanent varnishes last between 2 and 3 weeks. Your manicure therefore remains perfect for a long time. The Gel Colors arise quickly and are therefore very popular with beauty professionals. The range comes in many colors so you can find the color you want for your manicure. You will also find among the classic colors, original Gel Color themed collections designed by OPI.