Custom CSS allows you to fully customize your referral program to make it fully match your website. You can use custom CSS to add support for your font, your brand colors, and much more.
Add custom CSS, only if you have knowledge of HTML and CSS.
To get started go to the advance section for Bamboo here.
Enter your Custom CSS in the Custom CSS field and save your changes. Be aware that due to caching it might take up to 15 minutes for your changes to reflect on your website