About: Resistor color codes use colored bands to indicate resistance value and tolerance. 4-band resistors have 2 significant digits, a multiplier, and tolerance. 5-band resistors add a third significant digit for higher precision. Black=0, Brown=1, Red=2, Orange=3, Yellow=4, Green=5, Blue=6, Violet=7, Gray=8, White=9, Gold=±5%/×0.1, Silver=±10%/×0.01.