Radzen Blazor Components


Radzen Blazor Components library prioritizes accessibility for all users by adhering to the highest levels of web accessibility guidelines and recommendations. It can help you make your Blazor app accessible and compliant with WAI-ARIA, WCAG 2.2, Section 508, and keyboard compatibility standards.

Applying guidelines link

While the components cover various accessibility standards to provide an inclusive user experience out of the box, inappropriate positioning or component configurations might lead to barriers such as low contrast between text and background colors, small text, empty or missing labels, etc. In addition, different standards and accessibility levels of conformance have different success criteria. All this introduces the need to always be aware and test your layouts, content, and component configurations against the desired accessibility guidelines.

Read more about testing and evaluating web accessibility on the World Wide Web Consortium (W3C) website.

WCAG 2.2 link

WCAG stands for Web Content Accessibility Guidelines - an internationally recognized set of recommendations for making web content more accessible. The latest WCAG 2.2 is the recommended specification by (W3C) since October 5, 2023.

See How to Meet WCAG (Quick Reference).

WCAG compliant theme colors (AA level of conformance) link

The Radzen.Blazor library contains a set of complementary WCAG AA compliant color sets for each one of the available themes.


To preview the colors in the demos, enable the "Use WCAG compliant colors" option in the demos configuration.


To use the colors in your apps, include the [theme]-wcag.css file right after the [theme]-base.css:

<link rel="stylesheet" href="_content/Radzen.Blazor/css/standard-base.css">
<link rel="stylesheet" href="_content/Radzen.Blazor/css/standard-wcag.css"> <!-- Load WCAG 2.2 AA compliant colors -->

High Contrast theme colors PROlink

Higher contrast makes app content easier to look at and quicker to read.

HighContrast swatches are a premium feature available in Radzen Blazor Studio with an active Radzen Professional or Enterprise subscription. Read more ...
Radzen Blazor Standard theme with default, WCAG AA, and HighContrast WCAG AAA colors

ARIA attributes link

Radzen.Blazor leverages Accessible Rich Internet Applications (ARIA) attributes to enhance the accessibility of the components. ARIA attributes provide additional information to assistive technologies, making complex widgets and interactions more understandable and navigable for users with disabilities.

See ARIA Authoring Practices Guide (APG).

Semantic HTML link

Radzen.Blazor prioritizes the use of semantic HTML elements to ensure proper document structure and meaningful markup. Semantic HTML helps screen readers and other assistive technologies understand the content and navigate through it more efficiently.

Screen reader compatibility link

Radzen.Blazor provides appropriate labels, roles, and descriptions to enable screen reader users to understand and interact with the components effectively.

Responsive design link

The components are designed to be responsive and adaptable to different screen sizes and devices. Accessibility features remain intact across various breakpoints, enabling users to access and use the components seamlessly on desktops, tablets, and mobile devices.

Keyboard compatibility link

Keyboard compatibility implies that all application functionality must be usable with the keyboard without any focus traps, allowing the user to freely move across the application via only a keyboard interface.

Focus management

Focus states are carefully managed to ensure that keyboard users can easily identify which element has focus as they navigate through the components. Clear and consistent focus styles are applied to interactive elements to enhance usability and accessibility.

Keyboard navigation with Radzen Blazor Components

The following is a list of the common key shortcuts to navigate and interact with Radzen Blazor Components.

Press this key To do this
Tab Focus next UI element.
Shift + Tab Focus previous UI element.
Arrow keys in a focused complex component Focus subcomponents.
Space or Enter Toggle components's state or navigate.
Esc Close or collapse a component.

Supercharge your Blazor development with Radzen Blazor Studio

Radzen Blazor Studio is a software development environment that empowers developers to design, build and deploy Blazor applications without the traditional hurdles. Write less code and get more done.

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Radzen Blazor Components, © 2018-2024 Radzen.
Source Code licensed under MIT

Demos Configuration

Premium Themes

  • Material 3
  • Fluent
  • Material 3 Dark
  • Material Dark
  • Fluent Dark

Free Themes

  • Material
  • Standard
  • Default
  • Humanistic
  • Software
  • Dark
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