Hello,
do you mean color on menu items?
You can change it in: wp-content\themes\duelmotion\style.css
on line 819 you’ll see this code:
nav > ul > .current-menu-item > a, nav > ul > .current-post-ancestor > a, nav > ul > .current-menu-ancestor > a {
color: #505050;
}
this is for current menu items.
Header background can be changed in the same file, line 590, you’ll see this code:
#dm_main_header {
width: 100%;
background: #fff;
padding: 30px 40px;
box-shadow: 0px 0px 8px 2px rgba(0,0,0,0.2);
z-index: 9999;
}
just change background value.
Please, let us know if that helped you.
Regards