CMYK printing is a printing technique using four colours. This subtractive colour model allows a wide range of colours to be produced by synthesis, subtracted from three basic or primary shades: blue (cyan), red (magenta) and yellow, to which black is added.

A common error when sending print data is sending a file in RGB colour mode. For prints, you must send us your data in CMYK colour mode. This is the right format for correctly viewing the colours of a print.