Large and colored front sight ring The Brightest Tritium night sights Mepro Hyper-Bright fixed pistol sight features an extremely bright contrasting colored ring front sight. Shooters can select from one of three colors* Green, Yellow or Orange*for the front sight. The tritium is illuminated green to provide low-light and nighttime aiming capabilities. The contrast in colors of the two components helps the shooter focus on the front sight quicker, which is critical in defensive and competitive shooting.