----- Original Message -----
From: "Rafael Copquin" <rcopq...@fibertel.com.ar>
To: <profoxt...@leafe.com>
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.
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