The theme’s colour for this option is green. When I went into the .css and changed every instnace of green to my colour (yellow), everything else changed OK, except for the them’s home page slider title text, whose background is green. Can anyone help me to locate it in the .css?
You can find the .featured-text .active selector in style.css file where you can change the border as well as background color for that button.
We recommended you to customize the CSS by creating child theme so that your changes will not lost whenever you update the theme to the new version OR upgrade to the premium version where you can change the theme color skin easily.