Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

CSS How to Make a Website Responsive Web Design and Testing Adjust the Profile Page and Header

My header border is not showing up. I've tried other colors and it still won't show.

header { border-bottom: 5% solid #59689a; margin-bottom: 60px; }

I've tried changing the color and my border still won't show up.

1 Answer

Ryan Field
Ryan Field
Courses Plus Student 21,241 Points

border-bottom does not support % values. It takes a length value such as px, em, or rem, so you'll need to use one of those instead of 5%.

Thank you.