Matching Windows Palette Custom Colors to PowerPoint Palette
  
PSS ID Number: Q117729
Article last modified on 05-16-1998
 
windows:3.0,4.0,4.0a,4.0c
 
WINDOWS
 

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The information in this article applies to:
 
 - PowerPoint for Windows, versions 3.0, 4.0, 4.0a, 4.0c
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SUMMARY
=======
 
If a custom background color is created in Microsoft Graph, a slide
background color can be created to match it. The three-digit RGB values
from Graph can be multiplied by 256 to obtain the five-digit RGB values for
the PowerPoint palette. Only the RGB values need to be matched; the HSL
values will be automatically calculated.
 
As a result, if you edit a color in Graph and give it the following values
 
   Red:     90
   Green:  130
   Blue:   120
 
the equivalent values to use in PowerPoint's More Colors dialog box
are:
 
   Red:    23040     (90x256)
   Green:  33280    (130x256)
   Blue:   30720    (120x256)
 
This conversion will also work any time you want to duplicate a custom
color created in any application that uses a 24-bit color addressing
scheme in PowerPoint.
 
MORE INFORMATION
================
 
The PowerPoint palette information is stored in 48-bit format so that
it is compatible with the way color is stored on the Macintosh.
Graph uses the Windows palette, which stores color in 24-bit format.
In 48-bit format, the RGB values are each represented by a 16-bit
number. In 24-bit format, they are represented by an 8-bit number.
When a 16-bit color is translated to an 8-bit color, the least
significant 8 bits are truncated. When an 8-bit color is translated
to a 16-bit color, zeroes are entered for the least significant 8 bits.
This is equivalent to multiplying and dividing by 100 hex, or 256
decimal, as the numbers are displayed in decimal format in the Custom
Colors dialog box.
 
When dividing a five-digit color number by 256, truncate the result to
its integer value to get the three-digit color number.
 
This color matching calculation is not necessary when using PowerPoint for
the Macintosh because the Macintosh version of the Graph utility also uses
48-bit color. When a graph is brought from the Macintosh platform to the
Windows platform, the graph color information is recalculated as stated
above.
 
For additional information, please see the following article(s) in the
Microsoft Knowledge Base:
 
   ARTICLE-ID: Q86446
   TITLE     : Equivalent Values for Genigraphics Colors: RGB
 
   ARTICLE-ID: Q86445
   TITLE     : Equivalent Values for Genigraphics Colors: CMYK
 
   ARTICLE-ID: Q68563
   TITLE     : Values for Hue, Saturation, and Luminance Change Slightly
 
Additional query words: power point
winppt 4.00a 4.00c graph msgraph
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Keywords          : kbinterop
Version           : windows:3.0,4.0,4.0a,4.0c
Platform          : WINDOWS
Hardware          : x86
Issue type        : kbinfo
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Copyright Microsoft Corporation 1998.