Theme settings allows you edit background image, font color, font size, link color as you like. Please go to Design-> Theme settings to customize your store appearance. Click on save, refresh your store front and enjoy your new look.
If there is no change of your store front after clicking on save, it is because you have edited template & CSS of your store before. In this case, please keep your modification of template & CSS and contact us. We'll reset template for you to solve this problem.