Mobile menu

Hi.

I am working on mentalcoach.dk
On a mobile, the mobile menu is hardly not visible, because the background picture are dark.
I have searched but cannot find the solution

My question: How to i light up the symbol for the mobile menu (change color)
Alternative:
How do i put in a menu background color - like the picture on this page: www.joomlaplates.com/forum/j3-scene/4861...m-right-to-left#8752

Add this code to your css/custom.css

.uk-navbar-toggle {
color: #777777;
background:#fff;
}