How to add Custom CSS to Tumblr theme

Learn how to add custom CSS on Tumblr and personalize your blog’s appearance with our step-by-step guide. Enhance your Tumblr theme by tweaking colors, fonts, and layout using custom CSS code. Unlock endless possibilities to express your unique style and make your blog stand out from the crowd. Elevate your blogging experience with our easy-to-follow instructions for adding custom CSS on Tumblr.

You will need to go to the customize screen, scroll all the way down then click on Advanced Options.