A limited number of colours plus shades of those colours. Shades are created by adding white or using different colour patterns.

A limited number of colours plus custom colours. For example, mixing red and blue for purple.

Matching Colours displayed on your monitor with printouts

Colours are displayed on a video monitor by mixing the colours red,

green, and blue (the three primary colours of visible light) in the

RedYellow amounts required to produce any given colour. This sort of display

technology is called RGB. In the RGB method, the more intense the colours you mix, the brighter the colour becomes.

Green RGB method Blue MagentaCMYK method Cyan

5

Printing technologies, on the other hand, employ the three primary colours cyan, magenta, and yellow, plus black (or K) to produce colour effects. This method is called CMYK. In the CMYK method, the more of a given colour you add to a mixture of colours, the darker the resultant colour becomes.

As these paragraphs illustrate, the methods used to produce colour in displays and printers are completely different. Other factors that can affect the perception of colour are the quality of paper, type of print media, and differences in the source of light in use when viewing the colours. For these reasons, it is impossible to avoid some differences in the perceived colour of a document or image viewed on a monitor, and the same image in printed form. In order to achieve a printed result which looks like the image displayed on the screen of a monitor, you must first make the appropriate settings to both the software application and the printer.

Chapter 5 Colour Printing and Black-and-White Printing 59

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Image 60
Canon K10158 Matching Colours displayed on your monitor with printouts, Green RGB method Blue MagentaCMYK method Cyan