What is UI design?
UI design (user interface design) is the design of what people see and interact with on a screen: layout, colours, typography, buttons, icons and their states. It turns UX decisions into a visual interface that developers can build.
Also called: user interface design
Why it matters
The interface is what customers judge your product by on first use, and what your developers rebuild every time it is inconsistent. A clear UI with a design system makes screens faster to build and easier to change. It also covers contrast and text sizes for accessibility.
1UI vs UXUX decides the steps and the flow; UI decides how each screen looks and responds to a tap or click.
2Design systemA shared library of colours, type, components and rules, so every new screen matches the last.
3States matterEvery button and form needs hover, error, loading and empty states, not only the happy path.
ExampleA recruitment agency in Almaty has an app built over the years by different developers, with buttons in several styles. A UI designer creates a design system in Figma with one set of colours, type and components and checks the screens in Russian and Kazakh. New screens are built from it, and the app starts to look like one product.
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Related terms
UX designDeciding how a product works for its users, so they reach their goal without confusion.Landing pageA single web page built for one campaign and one action, such as a sign-up, booking or enquiry.WCAGThe W3C guidelines for making websites and apps usable by disabled people, in levels A, AA and AAA.
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