Hamburger Menu background color

Site URL: https://www.birdmafia.com

I've tried a ton of code on this site already, but finding none that works to change the background color of the hamburger menu.... I'd like to make it a light grey.  If there is any known code, maybe adding that text is black as well (so I can change the color code in future if I'd like to.)

website:  birdmafia.com

@media screen and (max-width:768px) {
div#sideTrayWrapper {
    background: red;
}
}

Tried that already to no avail.

above code for mobile

this code for all devices

div#sideTrayWrapper {
    background: red;
}