Hi :
Can anyone please help me about how to find whether a
particular color value in RGB is out of cmyk-gamut
for example in photoshop the color picker gives
warning for some specific RGB colors .
eg (R,G,B)(0,255,100) is out of gamut.

i would be gratefull,if anyone can help me from
programing point of view about how to find if a particular RGB values is not in the CMYK gamut
thanks
Ahmed