Hello,
Thank you very much for choosing our theme and contacting us.
1/ In order to change the social icon color Black to white you will need to Woodmart > Head builder http://prntscr.com/iyd2pe and choose the proper header type (your current) http://prntscr.com/iyd333
2/ Enter the editing mode of a row in the Header http://prntscr.com/iyfh9u and set the “light” or “dark” color scheme http://prntscr.com/iyfib5 As you see from the screenshot you will able also to set the background for the header.
Take into consideration that there is also the mobile view of your header http://prntscr.com/iyd3v3 check all the elements there.
3/ Add this CSS code to Theme Settings > Custom CSS > Desctop
.woodmart-social-icons.icons-size-default .woodmart-social-icon i {
font-size: 18px;
}
Change the value to increase social icons.
4/ Try this CSS code to change color on hover for Whishlist
.woodmart-wishlist-info-widget>a:hover{
colro: #f9f9f9f;
}
Change #f9f9f9f for color you need.
If CSS code is not workable, make all the modifications in the header and contact me with admin access.
Best Regards