How do i change this yellow line in listing hive

[oz1982]

Hi there, I’m trying to Change the color of this little yellow line under the search bar but i cannot for the life of me find out where or even if this is possible!.

[Fabricator]

Hi!
Add this css in the front-end admin top bar > Customize > Additional CSS.
Replace the color as you wish. Pick up your favorite color in >Here<

.content-title::before { background-color: #699DEA; }