----- Original Message -----

From: "Rafael Copquin" <rcopquin@fibertel.com.ar>

To: <profoxtech@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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