# paper-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 `<paper-radio-group>` 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 <paper-radio-button></paper-radio-button> <paper-radio-button>Item label</paper-radio-button> ``` Styling a radio button: ```html <style is="custom-style"> :root { /* Unchecked state colors. */ --paper-radio-button-unchecked-color: #5a5a5a; --paper-radio-button-unchecked-background-color: #fff; --paper-radio-button-unchecked-ink-color: #5a5a5a; /* Checked state colors. */ --paper-radio-button-checked-color: #009688; --paper-radio-button-checked-ink-color: #0f9d58; --paper-radio-button-label-color: black; } </style> ```