Tint / colors / density
Unfortunately there is no a standard color chart. We use different labs to fulfill prescription sun glasses orders depending on which Rx program each brand offers. Please let me know which prescription sunglasses brand you are looking at & which color you are interested in, and i will see if we have an image. If not, I will try to describe it for you.
I have attached the images for the blue and crimson mirror lenses below. Please note that depending on the monitor resolution and color properties, the images might look slightly lighter/darker on your screen or the color might be little bit off. There is no image for the clear blue mirror lens. It is a clear lens covered with a a very light flash blue mirror coating. It is very light when you look through it. It looks like an almost clear lens with a light blue shine.