The Standard 12-Color Sequence (EIA/TIA-598 & IEC)
All telecom-grade fiber cables follow an established optical color sequence. Every technician working on CoreMap should be familiar with this exact order:
| Fiber # | Color | Hex Code Equivalent | Typical Tube Group |
|---|---|---|---|
| Fiber 1 | Blue (നീല) | #2563EB | Tube 1 (Blue) |
| Fiber 2 | Orange (ഓറഞ്ച്) | #F97316 | Tube 1 (Blue) |
| Fiber 3 | Green (പച്ച) | #16A34A | Tube 1 (Blue) |
| Fiber 4 | Brown (ബ്രൗൺ) | #92400E | Tube 1 (Blue) |
| Fiber 5 | Slate / Grey (ഗ്രേ) | #64748B | Tube 1 (Blue) |
| Fiber 6 | White (വെള്ള) | #F8FAFC | Tube 1 (Blue) |
| Fiber 7 | Red (ചുവപ്പ്) | #DC2626 | Tube 1 (Blue) |
| Fiber 8 | Black (കറുപ്പ്) | #1E293B | Tube 1 (Blue) |
| Fiber 9 | Yellow (മഞ്ഞ) | #EAB308 | Tube 1 (Blue) |
| Fiber 10 | Violet / Purple (വയലറ്റ്) | #9333EA | Tube 1 (Blue) |
| Fiber 11 | Rose / Pink (റോസ്) | #EC4899 | Tube 1 (Blue) |
| Fiber 12 | Aqua / Turquoise (അക്വാ) | #06B6D4 | Tube 1 (Blue) |
High-Count Cables (24F, 48F, 96F)
For cables with more than 12 fibers, the cores are organized into separate color-coded buffer tubes. The tubes follow the same 12-color sequence:
For example, in a 48F cable with 4 tubes of 12 fibers each, Tube 1 is Blue, Tube 2 is Orange, Tube 3 is Green, and Tube 4 is Brown. Fiber 15 would be the 3rd fiber (Green) in the 2nd tube (Orange).
CoreMap automatically maps this multi-tube hierarchy visually, showing both the tube color and the fiber color in every junction box cross-connect diagram.
Never splice different color codes together without documenting it in CoreMap. A cross-color joint documented in CoreMap prevents hours of confusion during future cable cuts.