You may want to put a fresh coat of paint on your storefront from time to time. Whether you need to add some holiday cheer or just freshen things up, you can change font and background colors by editing your store's css templates.
You don't need brushes or tape - just a solid understanding of CSS/HTML. You can customize your template in your Admin Area under Design > File Editor.
Keep in mind that many of our free templates come in various colors, so if you want a different color scheme with the same look and layout of your current template, you might just try out a new template instead of customizing the one you're using.