The metal film resistor -
color code

Image :
Metal film resistor.
Ring count from left to right.
This resistor has 220 ohm resistance.

Metal film resistor - color code
---------------------------------
            
            value   value   value   multiplier
            |       |       |       |       tolerance
            |       |       |       |       |
Color       ring 1  ring 2  ring 3  ring 4  ring 5       
--------------------------------------------------
silver                               0.01   
gold                                 0.1    
--------------------------------------------------
black        0       0       0       1
brown        1       1       1      10      +/-1%
red          2       2       2     100      +/-2%
orange       3       3       3       1k
yellow       4       4       4      10k
--------------------------------------------------
green        5       5       5     100k     +/-0.5%
blue         6       6       6       1M
violet       7       7       7      10M
gray         8       8       8     100M
white        9       9       9
--------------------------------------------------
         

Example: 
220 ohm metal film resistor 
with +/-1% tolerance

Ring 1 = red    = 2
Ring 2 = red    = 2
Ring 3 = black  = 0
ring 4 = black  = multiplier 1
Ring 5 = brown  = +/-1%