| Developed in the early 1940s, (* see note at bottom) this color code uses only 10 colors divided into 5 group colors and 5 pair colors. | ||||
| Tip + | Ring - | |||
| 1st group White | ||||
| blue | 1st pair | |||
| orange | 2nd pair | |||
| green | 3rd pair | |||
| brown | 4th pair | |||
| slate | 5th pair | |||
| 2nd group Red | ||||
| blue | 6th pair | |||
| orange | 7th pair | |||
| green | 8th pair | |||
| brown | 9th pair | |||
| slate | 10th pair | |||
| 3rd group Black | ||||
| blue | 11th pair | |||
| orange | 12th pair | |||
| green | 13th pair | |||
| brown | 14th pair | |||
| slate | 15th pair | |||
| 4th group Yellow | ||||
| blue | 16th pair | |||
| orange | 17th pair | |||
| green | 18th pair | |||
| brown | 19th pair | |||
| slate | 20th pair | |||
| 5th group Violet | ||||
| blue | 21st pair | |||
| orange | 22nd pair | |||
| green | 23rd pair | |||
| brown | 24th pair | |||
| slate | 25th pair | |||
| This solid color code actually goes up to 25 pair. It is so old now, I can't find a complete reference to it any more. | |||||
| Tip + | Ring - | ||||
| Old Color Code | |||||
| green | red | ||||
| black | yellow | ||||
| white | blue | ||||
| brown | orange | ||||
| pink | gray | ||||
Ethernet Color Codes
|
| Click for enlargement |
| Pin | Fnctn | Pair | Color A* |
Color B* |
|
| 1 | TX+ | 2 | |||
| 2 | TX- | 2 | |||
| 3 | RX+ | 3 | |||
| 4 | 1 | ||||
| 5 | 1 | ||||
| 6 | RX- | 3 | |||
| 7 | 4 | ||||
| 8 | 4 | ||||
| Function refers to NIC (network card) pins | |||||
| * It doesn't matter whether you use type A or B but to avoid confusion you should use the same type throughout your network | |||||
| Category 3, category 5, what's the difference? Click for more info  |
| International color coding for UL-/CSA-Control Cable | |
| 1 black 2 brown 3 red 4 orange 5 yellow |
6 green 7 blue 8 violet 9 grey 10 white |
