Most of us may choose gray tints, because they help provide true color perception, as well as reduce fatigue and glare. It is the most popular tint for general purpose use, providing the best sun-blocking and anti-glare protection on bright, sunny days.
Green tints are best for me, as they are great for low-light conditions and help to diminish glare, brighten shadows, and are known to help improve visual sharpness. They are great to wear for baseball, golfing, and fishing.
Gradient tints are a chic choice for outdoor sunglasses. Some usual gradient tint options include: gray, amber, green, blue, pink, and purple. You can choose them depends on your need.