Header Background Color Removal

Site URL: http://www.therockheath.org

I want the text to remain in my header. I just want to remove the background color. How do I do that? 

add to Home > Design > Custom CSS

/* remove background */
.x-navbar {
    background: white;
    border-bottom: none !important;
    box-shadow: none !important;
}
/* set text color */
.x-navbar * {
    color: black;
}
/* set logo color */
.x-navbar img {
    filter: grayscale(1);
}