Designers can have a more significant impact than pushing pixels and can help with the totality of what we produce. But this can only be achieved when product design is implemented from the start, at the strategy level.
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How to Build a Bulletproof Product Design Strategy
Jakob Nielsen's 10 general principles for interaction design. They are called "heuristics" because they are broad rules of thumb and not specific usability guidelines.
Colour contrast between text and background is important on web pages. It affects some people’s ability to perceive the information (in other words to be able to receive the information visually).