This is another commonly used principle that makes certain parts of your design stand out to your users. > **The principle of contrast:** The juxtaposition of visually dissimilar elements in order to convey the fact that these elements are different (e.g., belong in different categories, have different functions, behave differently). In other words, contrast provides the eye with a noticeable difference (e.g., in size or colour) between two objects (or between two sets of objects) in order to emphasize that they are distinct. The principle of contrast is often applied through colour. For example, red is frequently used in UI designs, especially on iOS, to signify deleting. The bright colour signals that a red element is different from the rest. ![[image-5 1.png|602]]Often, in UX the word “contrast” brings to mind the contrast between text and its background. Sometimes designers deliberately decrease the text contrast in order to deemphasize less important text. But this approach is dangerous — [reducing text contrast](https://nngroup.com/articles/low-contrast/) also [reduces legibility](https://nngroup.com/articles/legibility-readability-comprehension/) and may make your content inaccessible. Use a colour-contrast checker to ensure that your content can still be read by all your target users. ![[image-6 1.png]]