What is UI design and how does it impact usability and visual clarity?

UI design, or user interface design, is the practice of designing the visual components a user interacts with directly: buttons, form fields, navigation menus, cards, modals, and the typographic and color systems that give them hierarchy and meaning. It is the layer of design that communicates function through visual language.

Strong UI design improves usability by making interactive elements immediately recognizable, ensuring contrast ratios meet WCAG 2.1 standards for readability, and maintaining visual consistency so users do not need to relearn the interface on every page. Tools like Figma enable UI designers to build component libraries where every button, input, and icon follows defined design tokens, eliminating visual inconsistency at scale.