Remembering Electronic Resistor Colour Codes
Resistor values are marked with small coloured stripes. The first two stripes represent numeric values and the third stripe is a multiplier. The fourth stripe gives you the resistor’s tolerance; that is, it tells you how close to the indicated value you can expect the resistance to be.
For example, a resistor with brown, black, orange and gold stripes is a 10,000-ohm resistor whose actual resistance may vary by as much as 10 per cent.
Here’s the full list to keep handy:
|Colour||Digit||Multiplier (in Ohms)||Tolerance (%)|