Color of indoor connection flexible optical cable

Indoor flexible optical cables typically use standardized jacket colors and a 12-color sequence for individual fibers according to the TIA-598-C standard.

Jacket Colors for Indoor Cables

Indoor or premises fiber optic cables often have colored outer jackets to indicate the type of fiber and its application. Common jacket colors include: Aqua for OM3/OM4 multimode fibersOrange for OM1/OM2 multimode fibersYellow for single-mode fibers (OS1/OS2)Plenum-rated cables may have off-white or gray jackets, while riser-rated cables are often orange or gray. These colors help technicians quickly identify the cable type and ensure proper installation in data centers, LANs, or office environments.

Individual Fiber Color Coding

Inside the cable, each fiber strand is color-coded using a 12-color sequence to simplify identification during splicing, termination, or troubleshooting. The standard TIA-598-C sequence is: BlueOrangeGreenBrownSlate (Gray)WhiteRedBlackYellowVioletRose (Pink)Aqua For cables with more than 12 fibers, the sequence repeats with stripes or tube color coding to maintain unique identification for each fiber. For example, in a 24-fiber cable, fibers 13–24 repeat the 12-color sequence but may include a black stripe or be grouped in a differently colored buffer tube.

Practical Notes

Indoor flexible cables are designed for easy routing and bending within buildings, so the jacket is often softer and more pliable than outdoor cables. Custom jacket colors can be used for specific projects or branding, but the internal fiber color sequence generally follows the TIA-598-C standard to ensure universal identification. Connectors and strain relief boots usually match the fiber type color to maintain consistent identification across the connection interface.

By following these color standards, technicians can reduce errors, speed up installation, and maintain network reliability in indoor environments.