[](https://travis-ci.org/PolymerElements/paper-radio-button) _[Demo and API docs](https://elements.polymer-project.org/elements/paper-radio-button)_ ##<paper-radio-button> Material design: [Radio button](https://www.google.com/design/spec/components/selection-controls.html#selection-controls-radio-button) `paper-radio-button` is a button that can be either checked or unchecked. User can tap the radio button to check or uncheck it. Use a `` to group a set of radio buttons. When radio buttons are inside a radio group, exactly one radio button in the group can be checked at any time. Example: ```html Item label ``` ### Styling The following custom properties and mixins are available for styling: | Custom property | Description | Default | | --- | --- | --- | | `--paper-radio-button-unchecked-background-color` | Radio button background color when the input is not checked | `transparent` | | `--paper-radio-button-unchecked-color` | Radio button color when the input is not checked | `--primary-text-color` | | `--paper-radio-button-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--primary-text-color` | | `--paper-radio-button-checked-color` | Radio button color when the input is checked | `--primary-color` | | `--paper-radio-button-checked-ink-color` | Selected/focus ripple color when the input is checked | `--primary-color` | | `--paper-radio-button-size` | Size of the radio button | `16px` | | `--paper-radio-button-label-color` | Label color | `--primary-text-color` | | `--paper-radio-button-label-spacing` | Spacing between the label and the button | `10px` | This element applies the mixin `--paper-font-common-base` but does not import `paper-styles/typography.html`. In order to apply the `Roboto` font to this element, make sure you've imported `paper-styles/typography.html`.