If you are using the Extra theme by elegant themes then you may want to behave so when there is no text in the title of widget there is not shown the bar with the background colour. Simply add this code via custom CSS.

.et_pb_widget .widgettitle {
padding: 0px 20px;
div#text-482803448 .widgettitle,div#text-482803462 .widgettitle,div#text-482803455 .widgettitle,div#text-482803473 .widgettitle,div#text-482803457 .widgettitle,div#recent-comments-3 .widgettitle{
padding:10px 20px;