What colors are there in multimode fiber

Multimode fiber cables are typically color-coded as orange, gray, aqua, violet, or lime, depending on the OM type and manufacturer.Standard Color Coding by Fiber TypeOM1 (62.5 µm core): Usually orange; legacy cables may also appear in older orange variants with lower bandwidth ratings .OM2 (50 µm core): Standard color is gray, though some early OM2 cables were also orange .OM3 (50 µm laser-optimized): Typically aqua; designed for high-speed VCSEL-based applications .OM4 (50 µm laser-optimized): Usually aqua, but some manufacturers use violet to differentiate it from OM3 in high-density data centers .OM5 (wideband multimode fiber, 50 µm): Standardized as lime green; compatible with OM4 performance at 850 nm but supports shortwave wavelength division multiplexing (SWDM) for higher capacity .Additional NotesLegacy and non-standard colors: Some older installations may not follow current standards, so always check the printed jacket markings for the exact OM type .Connector color coding: While the fiber jacket indicates the type, connector boots may also be color-coded to match the fiber type, especially in high-density setups .Single-mode distinction: Single-mode fibers are typically yellow, which helps visually separate them from multimode fibers . Understanding these color codes is essential for proper network installation, maintenance, and ensuring compatibility with transceivers and high-speed applications.