You can change the background color of the text columns widget. For that please follow the instruction below:
1) Please don’t forget to take a backup of the file prior to any change.
2) Open wp-content-> themes -> vertoh ->css ->layout.css via FTP or Cpanel.
3) Add the following style at the end of the stylesheet.
section#tile_textcolumns { background-color:#ccc;} // You can change this #ccc value.
4) Update the file to the server.