Resistor colour code
The value of most resistors is shown by a pattern of coloured rings. These are read starting from
the band closest to an end. The colours are internationally defined as listed below. Alas, the precise
meaning of 'red' or 'blue' is not, so some variation in the actual colours used does occur. As a result one
manufacturer's brown looks like another's orange. When in doubt use a meter to measure the value.