Electronics: Four band
resistor colour code

The resistor colour code is based on a series of coloured bands that denote its marked value (in ohms), its tolerance (i.e. the accuracy of its marked value expressed as a percentage), and its stability (where appropriate). Two versions of the colour code are widely used; the four band colour code and the five band colour code.

The four band resistor colour code

Click to see these examples: 1 kohm 2.2 kohm 560 ohm

Test your understanding by finding the values of the resistors shown below:

22ohm 10%

6.8kohm 5%

560kohm 10%

1.2Mohm 5%

33kohm 5%

82kohm 10%

150ohm 2%

56ohm 2%

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  Copyright 2002 Mike Tooley - All rights reserved.