Hi there,
Currently the only way to change it is via css hack and it is not possible to change the color via quick settings. You can try to inspect the element color itself via browser console and place the code inside your custom.css file that located inside your template folder.
I am really sorry but unfortunately this customization takes quite a bit of time and unfortunately we would not be able to further assist you with this as per our support policy,
http://stackideas.com/support . If this is a priority, please do post them on our sales section at
https://crm.stackideas.com and our sales department would get back to you with a proper quote.