Choosing color lenses for sunglasses shall depend on your usage because different colored lenses can be available for different occasion. If you are hunter, you can choose orange or yellow colored lenses for sunglasses. They can increase contrast that give you better vision. If you just wear for fashion, you can choose black colored lenses. They are not only cool, but also prevent strong sunshine. Of course, you shall not wear a pair of black sunglasses in a environment with dark light.