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| 1 # paper-radio-button |  | 
| 2 |  | 
| 3 `paper-radio-button` is a button that can be either checked or unchecked. |  | 
| 4 User can tap the radio button to check or uncheck it. |  | 
| 5 |  | 
| 6 Use a `<paper-radio-group>` to group a set of radio buttons.  When radio buttons |  | 
| 7 are inside a radio group, exactly one radio button in the group can be checked |  | 
| 8 at any time. |  | 
| 9 Example: |  | 
| 10 |  | 
| 11 ```html |  | 
| 12 <paper-radio-button></paper-radio-button> |  | 
| 13 <paper-radio-button>Item label</paper-radio-button> |  | 
| 14 ``` |  | 
| 15 Styling a radio button: |  | 
| 16 |  | 
| 17 ```html |  | 
| 18 <style is="custom-style"> |  | 
| 19   :root { |  | 
| 20     /* Unchecked state colors. */ |  | 
| 21     --paper-radio-button-unchecked-color: #5a5a5a; |  | 
| 22     --paper-radio-button-unchecked-background-color: #fff; |  | 
| 23     --paper-radio-button-unchecked-ink-color: #5a5a5a; |  | 
| 24 |  | 
| 25     /* Checked state colors. */ |  | 
| 26     --paper-radio-button-checked-color: #009688; |  | 
| 27     --paper-radio-button-checked-ink-color: #0f9d58; |  | 
| 28 |  | 
| 29     --paper-radio-button-label-color: black; |  | 
| 30   } |  | 
| 31 </style> |  | 
| 32 ``` |  | 
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