Hello my Problem is: There is a blue line at the top of the header picture (I don´t know if it´s called header, but I mean the picture under the mainmenu) and there is also one under the picture. The blue line is not on “HOME” but on all other pages.
Looks like you already have the option to change the header color in you theme. I can see inline css. If doesnt you can open header.php file and search for the id ‘branding’ , there you would change the background color of the header.