These sunglasses have Blue Lens options available.
Blue Lenses help to reduce glare, define contours, enhance color perception
Blue Lenses are great for foggy, hazy or snowy weather; fishing and other On-The-Water Sports along with golf, skiing, snowboarding, or any outdoor leisure activity
Blue Lenses are also said to offer noticeable difference with eye strain, calming properties and allowing for better concentration, ability in reducing migraines
On top of all that...Blue Lenses are definitely "on-trend"