Hi,
Just an example.
In order to achieve the following look on your website.
Please see the screenshot https://prntscr.com/705kw5
I had used firebug, which is a firefox browser extension to make a mockup on my browser while viewing your site.
Since you are using only text widgets on your footer, I will provide you custom css for text widgets only, it will not affect other widgets on your sidebar.
Go to Your WordPress Admin Appearance -> Theme Options -> Custom CSS and enter the following codes.
.widget_text .widget-title-background{
background:#fc4903;
border-radius: 3px 3px 0 0;
border: 1px solid #fc4903 !important;
bottom: 0;
box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 0 5px rgba(0, 0, 0, 0.3) inset, 0 1px 2px rgba(0, 0, 0, 0.29);
color: #fff;
left: -16px;
position: absolute;
right: -16px;
text-shadow: 0 1px 0 #000;
top: -1px;
}
.widget_text .widget-title {
color: #fff;
}
The above codes will give your footer widget titles a background color of #fc4903 and font color of #fff.
You can change the color codes to suit your needs. You can use this website https://www.w3schools.com/tags/ref_colorpicker.asp to assist you in picking a suitable color hex code.
Hope this is what your need.
Thanks!
Denzel