Resistor color code colour science

 The science of resistor colour codes 







In electrical circuits resistors are an important component as they provide resistance to current.The resistance is important as it produces a voltage drop across two points. Resistance in a circuit is created by a resistor or a resistance wire. When resistors are given out they are color coded to denote their resistance so that the circuit  maker is able to make the circuit according to his needs. 

The colour codes for a resistor look like this:
As you can see being able to read a resistor requires you to understand what color corresponds to which number, and remembering that can be a very lofty job. Fortunately I have been able to decode a color pattern for the numbers between 0-9. 
Before I start I would need to paste a photo of a colour mixing scheme for paints for you to understand it better
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Now here is the logic of the resistance color scheme I have decoded:

Number

Colour

Colour name

Combination on paint scheme

Existence in number scheme

Description

0

 

Black

Red, Yellow, Blue

2+4+6

Combination of all three Primary colours

1

 

Brown

Red, Black

0+2/(2+2+4+6)

Sandwiched between its primary colours which are:

  •  1st and 3rd numbers 
  •  1st primary and composite colours respectively
  • 1 is the numerical mean of 0 and 2
  • 1st odd number 

2

 

Red

Primary colour

2

1st primary colour, and 1st even number

3

 

Orange

Red, Yellow

2+4

Sandwiched between its primary colours which are:

  •  1st and 2nd even numbers 
  •  1st and 2nd primary colours
  • 3 is the numerical mean of 2 and 4
  • 3 is the sum of 1 and 2
  • 2nd odd number 

4

 

Yellow

Primary colour

4

 2nd Primary colour and 2nd even number

5

 

Green

Yellow, Blue

4+6

 Sandwiched between its primary colours which are:

  •  2st and 3nd even numbers 
  •  2nd and 3rd primary colours
  • 5 is the numerical mean of 4 and 6
  • 5 is the sum of 2 and 3
  • 3rd odd number 

6

 

Blue

Primary colour

6

 3rd primary colour and 3rd even number

7

 

Purple

Red, Blue

2+6

 Sandwiched between its primary colours which are:

  •  1st and 3rd even numbers 
  •  1st and 3rd primary colours

8         

 

Grey

Black, White

0+9/(2+4+6+9)

 Mix of the first and last colours/ Every primary and Unique colour

9

 

White

Unique colour

9

 Last colour to not have any primary colours


 Therefore for the numbers, there is a general pattern that can be extrapolated                                   

  • Every colour that represents a prime/ unique odd number is composite (except 7 from here) and is a numerical mean of the colours that represent its primary colours. Moreover it represents the arithmetic mean of the two numbers that represent its primary colours and is the sum of the place of its primary colours 
  • Every composite colour representing Prime odd numbers(except 7) is sandwiched between its two primary colours 
  • Every even number that has a coprime factor to 2 is represented by a primary colour
  • All colours representing Prime odd numbers are combination of 2 of the 3 prime colours (0&2,2&4, 4&6, 2&6) 
  • The penultimate colour: grey represented by 8 is a combination of the two ends of the spectrum, which accounts for all the colours that do not have a primary colour  


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