COLOR HASH CODES

Question

How can one know genuine color hash codes?
Is it that they all start and end with a number or letter?

Answer 1

#rrggbb is the hexadecimal representation of color

In hexadecimal representation each letter can be a digit(0-9) or an alphabet(a-f or A-F)
The alphabets represent numbers beyond 9 (upto 15)
eg : a = 10, c = 13, f = 15

So, a hexadecimal number can represent any of 16 possbility (0-f)

Color codes generally have two hexadecimal numbers for each of three primary color, giving 256 different possibility each for red, green and blue.
eg. A0 means 160 (16*10 + 1*0)
22 means 34 (16*2 + 1*2)
FF means 255 (16*15 + 1*15)

And, hence codes like #1275a8 can be break down into rr, gg, bb hexadecimal combinations

A reddish color has higher rr than gg or bb

Answer 2

It's from gbr system

Answer 3

Could you throw more light sir?

Answer 4

Oh yes I'm sorry it's rgb not gbr