Thanks for the info. You are right, the Spanish of French version have
tables that are easier to understand. No need to know Spanish of French
Rafael
El 06/09/2013 19:16, Gérard Lochon escribió:
----- Original Message ----- From: "Rafael Copquin"
<[email protected]>
To: <[email protected]>
Sent: Wednesday, September 04, 2013 8:49 PM
Subject: color codes
I need to create a table with color codes.
I wonder how are the numbers obtained. I do not want to use the RGB
function and I saw somewhere an algorithm or a function that gives
those numbers.
How?
Rafael Copquin
Hello Rafael.
The color_number and rgb(red,green,blue) values are related :
if you concatenate the hexadecimal values of the red, green and blue
components,
the result is the hexadecimal value of the color_number.
Color number => rgb() :
red = BITAND(0xff,color_number)
green = BITAND(0xff,BITRSHIFT(color_number,8))
blue = BITAND(0xff,BITRSHIFT(color_number,16))
Rgb() => color number :
color_number = BITOR(red,BITLSHIFT(green,8),BITLSHIFT(blue,16))
You can find the different values here :
http://en.wikipedia.org/wiki/List_of_colors_%28compact%29
(better use in spanish or french pages)
Gérard.
[excessive quoting removed by server]
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