Re: color codes

Author: Rafael Copquin

Posted: 2013-09-07 at 04:43:31

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"

> <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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[excessive quoting removed by server]

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