Inductor Colour Codes....

 Four Band Standard EIA Colour Code For Inductors.

inductor-colour-code.jpg
Band1234
Meaning1st Digit2nd DigitMultiplier (No. of zeros)
Tolerance %
Goldx 0.1 (divide by 10)+/-5%
Silverx 0.01 (divide by 100)+/-10%
Black00x1 (No Zeros)+/-20%
Brown11x10 (0)
Red22x100 (00)
Orange33x1000 (000)
Yellow44x10000 (0,000)
Green55
Blue66
Violet77
Grey88
White99
Not: If no Band 4 is used, tolerance is +/-20%

 Five Band Military Standard Inductor Colour Code

images/Inductor-Mil-code.jpg
Band12345
Meaning
(See Notes)
Mil. Spec.Digit or
Dec. point
Digit or
Dec. point
Digit 
(or Multiplier)
Tolerance %
GoldDecimal
point
Decimal
point
+/-5%
SilverAlways Silver
double width
+/-10%
Black000 
(or x 1)
+/-20%
Brown111
(or x 10)
+/-1%
Red222
(or x 100)
+/-2%
Orange333
(or x 1,000)
+/-3%
Yellow444 
(or x 10,000)
+/-4%
Green555
Blue666
Violet777
Grey888
White999

Notes:

The military standard for cylindrical inductors specifies 5 coloured bands The same colours are used as in the EIA 4 band code, but:
For band 1, a double width sliver band is used to signify Military Standard.

For values less than 10µH:

Bands 2, 3 and 4 indicate the value of inductance in µH
A gold band might be used in either band 2 or band 3. In either of these two bands, gold indicates a decimal point and band 4 is used as a digit instead of a multiplier band.
When no gold band is present in bands 2 or 3, band 4 is a multipier band.
For example:
  •   If bands 2,3 and 4 are red, gold, red the value would be 2.2 µH
  •   If bands 2,3 and 4 are gold, yellow, violet the value would be 0.47 µH (470nH)
Band 5 indicates the tolerance between 1% and 20%

For values of 10µH or more:

Bands 2 and 3 represent basic value, and band 4 gives the number of zeros.
For example:
  If bands 2, 3 and 4 are red, violet, orange the value would be 27000 µH