The colors typically follow a color scheme established by industry standards in a specific sequence. Giving an example: The 1st fiber is blue, the 2nd fiber is orange, the 3rd fiber is green. Those 12 colors are then repeated in the same sequence, but. Fiber optic cables are the arteries of modern communication—from data centers to factories, these slim strands of glass move terabits of information every second. But with thousands of fibers in a single cable, color coding is your universal translator. By adopting the TIA/EIA‑598C standard, you gain a universal “language” of colors that speeds identification, reduces miswiring, and enhances safety. Color Coding for Tight-Buffered Cables (Indoor Use) Indoor fiber optic cables, especially those with a lower fiber count (typically 6, 12, 24, etc. ), often use tight-buffered fibers. When we see a rainbow, we are seeing these principal spectral colors and from these colors come all other colors that we see with our eyes.