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An official website of the United States government

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An official website of the United States government

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Radio Button

Radio buttons allow users to select exactly one choice from a group.


Radio button list

A ChoiceList component can be used to render a radio button group or checkbox group. Use the type prop to specify the type of field to display.


Radio button children

Radio buttons can have optional checked or unchecked children that are conditionally shown based on the state of the checkbox.




See Storybook "Choice" page and Storybook "Choice List" page for React documentation.

Style customization

The following CSS variables can be overridden to customize choice fields:

CSS variables for choice
VariableDefault Core Theme Value
--choice__background-colorhex value: #ffffff--color-white
--choice__background-color--checkedhex value: #0071bc--color-primary
--choice__background-color--disabledhex value: #d9d9d9--color-border
--choice__background-color--inversehex value: #ffffff00--color-transparent
--choice__border-colorhex value: #262626--color-base
--choice__border-color--checkedhex value: #0071bc--color-primary
--choice__border-color--disabledhex value: #a6a6a6--color-gray-light
--choice__border-color--errorhex value: #262626--color-base
--choice__border-color--error--inversehex value: #ffffff--color-white
--choice__border-color--inversehex value: #ffffff--color-white
--choice__border-color--lefthex value: #0071bc--color-primary
--choice__border-color--focushex value: #004f84--color-primary-darker
--choice__border-color--disabled--inversehex value: #a6a6a6--color-gray-light
--choice__color--uncheckedhex value: #ffffff--color-white
--choice__color--disabledhex value: #5a5a5a--color-gray-dark
--choice-label__color--disabledhex value: #5a5a5a--color-gray-dark
--choice-label__color--disabled--inversehex value: #e9ecf1--color-muted-inverse

Form components

This component also makes use of form field styles, which can be customized by the following variables:

CSS variables for form
VariableDefault Core Theme Value
--form-hint__colorhex value: #5a5a5a--color-gray-dark
--form-hint__color--inversehex value: #e9ecf1--color-muted-inverse
--form-error__colorhex value: #e31c3d--color-error
--form-error__color--inversehex value: #f7bbc5--color-error-lighter


When to use

Radio buttons

  • When users need to select only one option out of a set of mutually exclusive choices.

When to consider alternatives

  • If there are too many options to display on a mobile screen. Consider a dropdown menu if you donโ€™t have enough space to list out all available options, and if the user can only select one of the options.
  • Never use radio buttons for optional questions, since once a radio button is selected from a list, it or another choice will remain selected.


  • Don't rely on the visual difference between radio buttons and checkboxes. Make it clear with words when users can select one or multiple options.
  • Users should be able to tap on or click on either the text label or the checkbox to select or deselect an option.
  • In general, list choices vertically; horizontal listings can make it difficult to tell which label pertains to which choice. An exception is where you have binary choices with short labels, like 'Yes / No'. The convention here is for horizontal alignment.
  • Avoid using negative language in labels as they can be counterintuitive. For example, โ€œI want to receive a promotional emailโ€ instead of โ€œI donโ€™t want to receive promotional email.โ€
  • Use caution if you decide to set a default value. Setting a default value can discourage users from making conscious decisions, seem pushy, or alienate users who donโ€™t fit into your assumptions. In addition, you'll never know if the user explicitly chose that option or just didn't notice the question. If you're unsure, leave nothing selected by default.

View the "Forms" guidelines for additional guidance and best practices.

Checked children and the expose within pattern

  • The <Choice> component includes a checkedChildren prop that can expose hidden text information or form elements. This expose within pattern is especially useful if you need to collect data from follow up questions or give just-in-time feedback.
  • Checked children can be exposed by checking the parent checkbox or radio button
  • The checkedChildren prop should return one or more items wrapped in a div with the following className: .ds-c-choice__checkedChild. This class sets the spacing and border color for the exposed elements.
  • Add the className .ds-c-choice__checkedChild--inverse to the div to show the inverse white border
  • You may need to add the className .ds-u-margin--0 to your child element(s) to avoid extra top margin
  • If you opt for smaller radio buttons or checkboxes, add className .ds-c-choice__checkedChild--small to your checked child container


  • Surround a related set of choices with a <fieldset>. The <legend> provides context for the grouping. Do not use fieldset and legend for a single checkbox.
  • Some screen readers read the legend text for each fieldset, so it should be brief and descriptive.
  • Each input should have a semantic id attribute, and its corresponding label should have the same value in its for attribute.
  • The custom checkboxes and radio buttons here are accessible to screen readers because the default fields are moved off-screen.
  • checkedChildren will be announced to screen readers when they are exposed. They have been tested with the following devices:
    • Windows 10 + Internet Explorer 11 + JAWS screen reader
    • Windows 10 + Chrome + JAWS
    • Windows10 - Firefox + NVDA
      • NVDA reads out the <select> label and every <option> value
    • MacOS Mojave + Safari + VoiceOver

Learn more

Component maturity

For more information about how we tested and validated our work for each checklist item, read our component maturity documentation.


  • Color

    Meets AA color contrast standards for accessibility and color blindness.
  • Forced Colors Mode (FCM)

    While using FCM the components text is legible and improves readability.
  • WCAG 2.1 Level AA Conformance

    All Axe checks for WCAG AA compliance have passed.
  • Screen readers

    VoiceOver, NVDA, and JAWS screen readers provide concise communication and interaction.
  • Keyboard navigation

    Component is fully navigable with a keyboard.


  • Storybook

    Component has stories to cover all defined props.
  • Responsive

    Component designed to work in all responsive breakpoints.
  • Spanish translations

    Includes Spanish translations for default text content.
    Not applicable


  • Code

    Tokens implemented in code.
  • Design

    Tokens implemented in the Sketch.