Function hexToRgb

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