There are resistors in wide usage having five and even six color bands. In the five-banded version, the first four bands indicate value, while the fifth band is for tolerance. The sixth band, when used, indicates temperature coefficient.
Here are two free, quick, and easy tools for converting color bands to values. The second program listed also provides info on the sixth band, as well as allowing the user to enter the value to see the associated color scheme(s):
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