Reference

Hi-vis Class 2 and Class 3 are performance classes set by ANSI/ISEA 107-2020, defined by minimum areas of fluorescent background and retroreflective material, and the gap is decided by traffic speed and exposure. This guide covers the class areas, garment Types O/R/P, Class E items, and a worked example of picking a class by jobsite.

Fluorescent yellow-green and orange-red are both ANSI-compliant hi-vis colors, but they are conspicuous against different backgrounds, which makes the color a real safety choice. This guide explains hi-vis color meaning, how the background colors and retroreflective tape work together, and which color to choose by environment.