A selection of nail polishes from the OPI Nail Lacquer range which have been tagged as having a holographic (or holo) finish. Holographic shades are often sub classified as being glitters or shimmers. So, what is holographic nail polish? How does it work? Well, holo lacquers use special pigments that create a rainbow-like, multidimensional effect when light bounces off their surface. These unique pigments diffract and refract light, causing the polish to 'shift' in colour when viewed at different angles.