To demonstrate how contrast and hierarchy can enhance mobile layout design, here are some examples of good and bad practices. For instance, a mobile app that employs contrast and hierarchy effectively will have a dark background, white text, and blue buttons; a large and bold heading; a small and light subheading; and a grid system that arranges the content into sections and cards. On the other hand, a mobile app that uses contrast and hierarchy poorly may have a light background, gray text, and green buttons; a small and thin heading; a large and heavy subheading; and an arrangement of content that overlaps and clashes. Similarly, a mobile website that incorporates contrast and hierarchy well will have a bright color scheme, a mix of fonts and sizes, an array of shapes and images, a clear and catchy headline, a concise and compelling introduction, and a linear flow that guides the user through the content and the actions. Conversely, if contrast and hierarchy are used badly in a mobile website, it may have a dull color scheme, one font size, no shapes or images, an unclear headline, an extensive introduction, as well as an illogical flow that confuses the user.