RGB refers to the primary colours of light, Red, Green and Blue, that are used in monitors, television screens, digital cameras and scanners. CMYK refers to the primary colours of pigment: Cyan, Magenta, Yellow, and Black. These are the inks used on the press in “4-colour process printing”, commonly referred to as “full colour printing”. The combination of RGB light creates white, while the combination of CMYK inks creates black. Therefore, it is physically impossible for the printing press to exactly reproduce colours as we see them on our monitors. For this reason, we request that you convert your colours from RGB to CMYK if your tools allow you to. By doing it yourself, you have maximum control over the results since you can do adjustments if a difference in colour occurs during the conversion. As with RGB, spot colours were not intended for the process (four colour: CMYK) environment. Although we can use spot colour, if required, it’s not a standard job so contact us for pricing and availability.