Functionality is reasonably claimed to be the foundation of good UX. But are we all only about functions? Users are people, with not only logic to solve problems but also emotions ruling their decisions. The trick supporting both is illustrations applied in web and mobile interfaces. Let’s check how they enhance UI design.

What is illustration?

Illustration visualizes a piece of a story. It presents a visual interpretation of a process, action, environment and the like. What makes it different from pure art is the aim of communication: illustrations are informative and transfer a message. They are usually created for a purpose and integrated into the variety of published media both printed and interactive. Illustrations also successfully serve as a decoration adding style to the environment or media it is applied to.

Benefits of illustrations for user experience

In the age of fast and massive information consumption, the role of visuals is growing. According to the explorations by S.Thorpe, D.Fize and C. Marlot on the speed of processing in the human visual system, it takes people on average 150 ms for a picture to be processed and 100 ms more to understand its meaning. Pictures are easier to remember and recall, their message is clear to people of different languages and regardless their ability to read. That is why infographics, icons, illustrations and other assets by graphic designers are used so widely.

Briefly, there are five big benefits of using custom illustrations in UI:

  • They are perceived faster than text so users may cover the key message quickly
  • They support a visual hierarchy of a page or screen
  • They strengthen the aesthetic and emotional appeal of the interface
  • They activate the psychology of color, shapes and visual metaphors
  • The are eye-catchy and draw users’ attention to the necessary details

Applied to websites and mobile applications, first of all, illustration is another functional element and only after that a decoration. To uncover all the benefits mentioned above, it’s vital to analyze the target audience and find the ideas and metaphors which will help the users to navigate and achieve their goals. Another thing is that UI illustrations should be concise and used in moderation: too high intensity of graphics increases the risk of overloading the interface.

Credits: Fireart

Types of UI illustrations

In the modern interfaces, we may find all the variety of styles and directions expressed in illustrations, from vector images and icons to elaborate digital artworks. Being a functional layout element, they may satisfy diverse needs and functions.


Onboarding is the concept that came to UX design from the sphere of employment and HR. It deals with some steps and techniques helping newcomers to understand how the interface works. Also, it is applied when new features and updates are introduced or users interact with a non-typical functionality.

Lots of digital products including big players like Dropbox and Slack effectively apply illustrations for this aim. Onboarding supported with meaningful artworks allows for a quicker explanation of the features and makes the UI lively.

interface illustration slack

Credits: Slack

Credits: Anastasiia Andriichuk

Credits: Dmitry Mokhar


One more type of illustrations are the ones which immediately set the general theme and mood of the website or app. They present strong visual metaphors and associations to establish an emotional appeal from the first seconds of interaction. It saves user’s time and effort supporting positive user experience and creating the necessary atmosphere.

Credits: Leo Natsume

Credits: Tubik

Sea theme by Icons8


Tutorials and tooltips illustrations present the visual prompts. This type activates the explanatory potential and its main aim is to clarify or encourage specific actions. Images of this type make UI much friendlier for people who don’t like or can’t read the copy. It works especially well in mobile interfaces concerning limited screen space. On the other hands, it means that even the slightest details of the picture should be thought-out not to provoke misunderstanding. Obviously, tutorial illustrations are a good idea for apps targeted at teens and children.

Credits: Cuberto

Adobe tutorial illustration by Timo Kuilder


Rewards form another popular type of interface illustrations. Badges, stickers, medals, stars, cups and all the other stuff of this kind adds gamification to user experience and marks a user’s progress. What could be sweeter than feeling you are a winner?

Credits: Josh Warren

Alarm stickers by  Tubik


Mascots are personified characters which easily add personification to the interface. They become a kind of communicators between the interface and the user. Mascots contribute much to the voice and tone of the website or app and can even become a metaphorical face of a product. Symbolic nature of these images makes them memorable: they breathe in life into the interactions.

Trello Mascot by Alexey Kuvaldin


Sometimes, UI illustrations have the primary goal to entertain users. You may say it has nothing to do with functionality – and that may be right. But it deals directly with emotions and aesthetic satisfaction. Who said that beauty, style or just fun could not be a reliable factor retaining users?

Credits: Ramotion

Bottom line

In his book Designing for Emotion, Aarron Walter says “We’ve been designing usable interfaces, which is like a chef cooking edible food. Certainly, we all want to eat edible foods with nutritional value, but we also crave flavor. Why do we settle for usable when we can make interfaces both usable and pleasurable?” Illustrations have a strong power of adding beauty, emotion and even storytelling to everything they touch. And that makes them worth considering as a powerful way to amplify user interfaces.

Did you come across any UI illustrations which couldn’t be overpassed?


Title image credits: Fireart

To learn more about visuals in UX design, check articles on icons and photos for user interfaces