Function hexToRgb

hexToRgb(hex?: string): undefined | string
Returns the converted rgb color from the given hex color
Parameters
- Optionalhex: string
  the hex color to inspect
Returns undefined | string
the converted rgb color from the given hex color
Author
David Hsing
Example
```
hexToRgb('#fff');    // 'rgb(255, 255, 255)'
hexToRgb('#ff0000');    // 'rgb(255, 0, 0)'
```