Fictive Theme: Removing page tab

Hi im wondering if anyone can help me!

Doing a website for my works https://www.afuseboardspecialist.com

I’m trying to get rid of the page tab thing which is over my banner photo and on every page … how do I get rid of it?

I’m also trying to change the brown colour border lines to the same colour blue as my logo?

Also when I clock onto a page say ‘Services’ I don’t want the big writing at the top, but still want it on the main menu … I’ve lost the home button of the list as deleted it of main page? What’s the proper way to sort this.

Any help hugely appreciated!!

Cheers

Mark