Define colour coding of TH resister?

Question

Accepted Answer

Colour coding of TH resistors is a system of using coloured bands to indicate the resistance value and tolerance of the resistor.

TH resistors have 4 bands - the first two bands represent the significant digits, the third band represents the multiplier, and the fourth band represents the tolerance.
Each colour corresponds to a number - for example, black is 0, brown is 1, red is 2, etc.
The first two bands determine the resistance value by combining the numbers represented by their colours.
The third band indicates the multiplier - for example, red represents x100, green represents x10000, etc.
The fourth band indicates the tolerance - for example, gold represents +/- 5%, silver represents +/- 10%, etc.

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