#custom-bg {
    background-color: #0aadff;
    background-image: url("https://www.transparenttextures.com/patterns/brick-wall.png");
}
#custom-bg-down {
    background: linear-gradient(to top, #000050, #0aadff), url(https://www.transparenttextures.com/patterns/brick-wall.png);
    background-blend-mode: overlay;
    background-position: center center;
}