Color: RGB and CMYK

Color is a very important mechanism used to develop and reinforce a concept or identity. Any color display you see on your monitor is a RGB combination or the RED, Green and Blue combination. RGB is a "additive color combination", i.e. when you add red, green and blue you get white. The printed color display is a CMYK combination or the Cyan, Magenta, Yellow and Black. This is also known as "4-color process" or "full color" printing. CMYK is a "subtractive color combination", when cyan, magenta and yellow colors are added it absorbs all the light and your eye perceives a black color.

Understanding of RGB and CMYK color space is very essential for designers and people who work in this field. This would clarify as to why some colors look different in a print as to seeing in a monitor.
http://marvin.mrtoads.com/rgb_vs_cmyk.html is a useful site for designers who work in the print media.

I find myself using more of the curves tool when working in the CMYK mode. This i guess is basically to balance the cyan and magenta values to bring the requiered shade of blue in the print output. Mac is any day preferable to work for print designs for the caliberation closeness between the screen and print. (I can still hear the mac guy cursing me for all the nagging i've done to caliberate my monitor to perfection)