>>How can I design an application so that the colours that I used will look the same on my client's machine as they are doing on mine?
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>>For example on my machine green is really green. On my client's machine green is leaning toward black.
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>THis is a result of the client machine attempting (unsuccessfully) to emulate a color that it can't produce.
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>When I have to choose colors for a downward compatible system, I set my system's colors to their number (256 or so), so I am seeing what they will see.

I'm lazier - I use the client-defined Windows palette, and make them live with their own color schemes! < g >