I am working in WordPress. I am using Option Tree to get theme options. I made a logo. I can get the logo by doing this

if ( function_exists( 'ot_get_option' ) ) {
  $logo = ot_get_option( 'logo' );
}

I didn't want to type all that stuff out all the time so I tried to make a function that would be a shortcut. It's working but not returning the data. My src attribute is empty when it should contain the url to the photo Here is my function

  function get_kiss_options($kiss_option) {
   if( function_exists( 'ot_get_option' )){
          $option = ot_get_option( '$kiss_option' );
      return $option;
     }
}

Then I call it like so

  get_kiss_options('logo');