RGB & CMYK

RGB Stands for Red, Green and Blue and they are know as 'additive colours'. Additive colours are used for light projection or for displaying images on a screen and are primarily used in web design. If you combine the three colours of RGB, in the middle, white will appear. RCG is the principal behind TV screens and computer monitors and uses light to produce its images.

CMYK stands for Cyan, Magenta, Yellow and 'Keyplate' Black. They are mainly used in printing and graphic design. They are different from RGB because if you combine Cyan, Magenta and Yellow it will form Black, however this black is not always acceptable during the print process hence the reason why Keyplate Black is used. Printers prefer files in CMYK because the majority of their print machinery is geared for this process.