Rinnegan eyes are characterized by ripple like pattern spreading all over the world. The purple scleras cover the eyes fully for an exalted SamSara eye look. For Rinngean cosplay, Phantasee Violet Colossus sclera lenses are a perfect choice. They are extremely huge since they are scleral lenses with 22 mm diameter. Colossus violet sclera lenses are totally opaque and mask every eye color irrespective of how dark it is.
Phantasee Colossal scleral lenses make perfect Rinnegan eyes. See the pictures in Phantasee Violet Colossus review.