12 fiber color code
A 12-fiber cable is the simplest TIA-598-C configuration: one buffer tube (or one ribbon) holding all 12 fibers in the base color sequence. No tracers, no tube-to-tube mapping — just the 12 standard colors in order.
The 12 fiber colors in order
- 1. Blue
- 2. Orange
- 3. Green
- 4. Brown
- 5. Slate
- 6. White
- 7. Red
- 8. Black
- 9. Yellow
- 10. Violet
- 11. Rose
- 12. Aqua
How 12F cable is built
In a 12-count loose-tube cable, you'll typically find one central buffer tube containing all 12 fibers in the sequence above. Fiber 1 is Blue, fiber 2 is Orange, continuing through fiber 12 Aqua. In a ribbon configuration, the 12 fibers are bonded side-by-side into a single ribbon with the same color order.
Common 12F configurations
- Central tube / loose tube: 1 × 12 fibers in a single buffer tube.
- Ribbon: 1 × 12-fiber ribbon, used in compact micro-ducts.
- FTTH drop: tight-buffered 12F risers.
Quick-reference table
| Fiber # | Color |
|---|---|
| 1 | Blue |
| 2 | Orange |
| 3 | Green |
| 4 | Brown |
| 5 | Slate |
| 6 | White |
| 7 | Red |
| 8 | Black |
| 9 | Yellow |
| 10 | Violet |
| 11 | Rose |
| 12 | Aqua |
Field tips
The two colors most commonly confused are Slate (position 5) and White (position 6). White is bright and reflective under a headlamp; Slate is a muted blue-gray. If you're unsure, compare against a known fiber in the same tube — the spec is consistent across manufacturers.
Another frequent trap: Violet (position 10) vs Rose (position 11). Violet has a blue undertone (true purple); Rose is warm pink. Under blue LED site lighting, Rose can look almost white.