Change nav SVG icon colour via CSS

Site URL: http://neonerp.com.au

Hi,

I want to change the colour of my nav (burger) icon and search icons to black via CSS (in my case, it will be used for mobile site where the banner image is disabled).

Can you help me?  I can't seem the change the fill colour or find the right element to use...

Add to Home > Design > Custom CSS

/* burger color */
svg.Icon.Icon--hamburger.nav-toggle-label-icon {
    stroke: black;
}
/* search color */
svg.Icon.Icon--search.search-icon {
    stroke: black;
}

Thanks very much @tuanphan.  That worked perfectly.