The best interfaces are almost invisible to the user. They avoid unnecessary elements and are clear in the language they use on labels and in messaging.

USWDS Keep the interface simple

By using common elements in your UI, users feel more comfortable and are able to get things done more quickly.  It is also important to create patterns in language, layout and design throughout the site to help facilitate efficiency. Once a user learns how to do something, they should be able to transfer that skill to other parts of the site.

USWDS Create consistency and use common UI elements.

Consider the spatial relationships between items on the page and structure the page based on importance. Careful placement of items can help draw attention to the most important pieces of information and can aid scanning and readability.

USWDS Be purposeful in page layout.

You can direct attention toward or redirect attention away from items using color, light, contrast, and texture to your advantage.

USWDS Strategically use color and texture.

Carefully consider how you use typeface. Different sizes, fonts, and arrangement of the text to help increase scanability, legibility and readability.

USWDS Use typography to create hierarchy and clarity.

Always inform your users of location, actions, changes in state, or errors. The use of various UI elements to communicate status and, if necessary, next steps can reduce frustration for your user.

USWDS Make sure that the system communicates what’s happening

By carefully thinking about and anticipating the goals people bring to your site, you can create defaults that reduce the burden on the user.  This becomes particularly important when it comes to form design where you might have an opportunity to have some fields pre-chosen or filled out.

USWDS Think about the defaults.

usability.gov says User Interface (UI) Design focuses on anticipating what users might need to do and ensuring that the interface has elements that are easy to access, understand, and use to facilitate those actions. UI brings together concepts from interaction design, visual design, and information architecture.

University of Michigan - Ann Arbor

USWDS is a design system for the federal government that makes it easier to build accessible, mobile-friendly government websites for the American public

U.S. Web Design System (USWDS)

U.S. Web Design System

"These design principles are intended to help teams across government align on important common goals and better use the design system — to be an evaluative lens for design and implementation decisions."

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