Resistor Color Code Guide: 3-Band, 4-Band, 5-Band & 6-Band Explained

Resistors are one of the most common electronic components, and identifying their values correctly is essential in circuit design, testing, and repair. Since most resistors don’t have printed values, engineers rely on the resistor color code system to determine resistance. In this guide, we’ll cover 3-band, 4-band, 5-band, and 6-band resistor color codes, provide a resistor color code chart, and explain how to read values such as 1k, 10k, 100k, 220 ohm, 470 ohm, and more.