Shifting RGB

[Mark Greenberg]

I'm writing a stack that has an image whose RGB values need to be  
exact. The program does hundreds of different things based on the RGB  
values of the color under the mouse pointer, so if the color changes,  
the program doesn't work.

I create the image in PhotoShop and then bring it into Rev as an  
image object (.png).  But in Rev the RGB values are different, darker  
by a non-constant amount.

I tried flood-filling the colored areas in Revolution, but that  
produced unacceptable results.

Why don't the RGB values remain intact in Rev? and what can I do to  
get around this problem?

        Thanks in advance,

		Mark Greenberg