Printing The vibrant colours and rich contrast of a photo viewed on your iPhone or Mac’s display can often look dull and flat when the image is printed out physically. This is due to a variety of factors. For starters, your Mac or iPhone’s screen displays millions of colours by mixing reds, greens and blues. In general, printers create colour by mixing cyan, magenta, yellow and key (black) inks (CMYK), which results in thousands rather than millions of colours (though some printers use extra inks for more faithful results – see page 65).
