Hello @hirschan,
To change the color of the button and title background of “Header right widget area” use below given CSS.
For this go to Admin Panel > Appearance > Customize > Additional CSS and paste below given CSS.
.call-to-action-buttons .custom-button {
background: #428cfa;
}
#header-widget .widget-title span {
background: #e56916;
}
You can change the color code as per your requirement .
Hope this helps.
If you have any issue further please feel free to post them.
Regards!!