Fix documentation for data-color

Author: jsdir

README.md

@@ -71,7 +71,7 @@ Prop                 | Type      | Description
 -------------------- | --------- | -----------
 `loading`            | `boolean` | Displays the button's loading indicator
 `progress`           | `number`  | Number from 0.0 to 1.0
-`data-color`         | `string`  | Color applied to the button (eg. `#222`)
+`data-color`         | `string`  | Color applied to the button (`{green,red,blue,purple,mint}`)
 `data-size`          | `string`  | A [button size](#sizes)
 `data-style`         | `string`  | A [button style](#styles)
 `data-spinner-size`  | `number`  | Number representing the size of the spinner in pixels

src/LaddaButton.jsx

@@ -34,7 +34,7 @@ class LaddaButton extends Component {
 
     // Ladda props
     // eslint-disable-next-line react/no-unused-prop-types
-    'data-color': PropTypes.string,
+    'data-color': PropTypes.oneOf(['green', 'red', 'blue', 'purple', 'mint']),
     // eslint-disable-next-line react/no-unused-prop-types
     'data-size': PropTypes.oneOf(SIZES),
     // eslint-disable-next-line react/no-unused-prop-types