ImageData, colors and screen

[Ludovic Thébault]

Hello,

i use imagedata to replace one color by an other in a picture (which is 
inclued in the stack).

for example :

get the imagedata of mypicture
replace (numtochar(0)&numtochar(200)&numtochar(248)&numtochar(248)) 
with \
        (numtochar(0)&numtochar(200)&numtochar(200)&numtochar(200)) in 
it


On my mac, it work. but on other mac, or pc, it doesn't work.

Why ? Colors are not the same ?


thanks

PS : With Rev 2.5

Ludovic