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Accessibility of content on the web is crucial to ensure that everyone has access to the same information and services. For example colour contrast between text and background is important on web pages as it affects some people’s ability to perceive the information (in other words to be able to receive the information visually). The human eye and brain is are very good at distinguishing shapes, patterns and colours generally, but for a significant number of people there can be difficulties distinguishing some shades, or some colours.
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