@drew: Thanks for your appreciation. Just wanted to let you know that you should never edit any core theme files like style.css, index.php, functions.php and so on. As all the edit in the core theme files will be reverted back when you update the them.
So, to edit the CSS. Either you need to add in “Appearance => Theme Options => Custom CSS” box or you need to build child theme and add the css that you want to change in child theme style.css. It would have been easy if you had post in your site URL. So, now I am assuming that you are using Catch Kathmandu theme. If you upgrade to Pro version then you will be able to change the color from Color Options panel. So try that. If you want to stick with the free one then send me your site URL and let me know the color that you want to change to. Also is it background color or text color.