The tinted lenses always keep the original color, not be changed by sunlight. They are available in several colored stems, such as: brown, gray, orange, rose, yellow, G-15 (Greenish Grey) and blue, etc. Usually the dark colors are better to block the harmful rays, and the light colors are used to add your fashion, so if you are most of the time being exposed to strong lights like by the sea, you are recommended to wear the sunglasses with dark colors. Besides, some kind of color may have its special function. Such as, the lenses with yellow color are the best choice for shooters in order to decreases the haze and make the target object clear. The gray, brown, and G-15 with function are well in the common UV rays prevention.