Farbcode für Widerstände 4 Ringe
| Kennfarbe | 1. Ring | 2. Ring | 3. Ring | 4 .Ring | |
| 1. Ziffer | 2. Ziffer | Multiplikator | Toleranz | ||
| keine | x | - | - | - | ±20% |
| silber | - | - | 10-2 = 0,01 | ±10% | |
| gold | - | - | 10-1 = 0,1 | ±5% | |
| schwarz | - | 0 | 100 = 1 | - | |
| braun | 1 | 1 | 101 = 10 | ±1% | |
| rot | 2 | 2 | 102 = 100 | ±2% | |
| orange | 3 | 3 | 103 = 1 000 | - | |
| gelb | 4 | 4 | 104 = 10 000 | - | |
| grün | 5 | 5 | 105 = 100 000 | ±0,5% | |
| blau | 6 | 6 | 106 = 1 000 000 | ±0,25% | |
| violett | 7 | 7 | 107 = 10 000 000 | ±0,1% | |
| grau | 8 | 8 | 108 =100 000 000 | - | |
| weiß | 9 | 9 | 109 = 1 000 000 000 | - | |