body {
    .custom-bg{
       background-color: hwb(#ff0000);
    }
    background-color: #A9A9A9;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100%25' height='100%25' viewBox='0 0 1600 800'%3E%3Cg stroke='%236E6E6E' stroke-width='0' stroke-opacity='0.11' %3E%3Ccircle fill='%23A9A9A9' cx='0' cy='0' r='1800'/%3E%3Ccircle fill='%239e9e9e' cx='0' cy='0' r='1700'/%3E%3Ccircle fill='%23939393' cx='0' cy='0' r='1600'/%3E%3Ccircle fill='%23898989' cx='0' cy='0' r='1500'/%3E%3Ccircle fill='%237e7e7e' cx='0' cy='0' r='1400'/%3E%3Ccircle fill='%23747474' cx='0' cy='0' r='1300'/%3E%3Ccircle fill='%236a6a6a' cx='0' cy='0' r='1200'/%3E%3Ccircle fill='%23606060' cx='0' cy='0' r='1100'/%3E%3Ccircle fill='%23565656' cx='0' cy='0' r='1000'/%3E%3Ccircle fill='%234d4d4d' cx='0' cy='0' r='900'/%3E%3Ccircle fill='%23434343' cx='0' cy='0' r='800'/%3E%3Ccircle fill='%233a3a3a' cx='0' cy='0' r='700'/%3E%3Ccircle fill='%23313131' cx='0' cy='0' r='600'/%3E%3Ccircle fill='%23282828' cx='0' cy='0' r='500'/%3E%3Ccircle fill='%23202020' cx='0' cy='0' r='400'/%3E%3Ccircle fill='%23181818' cx='0' cy='0' r='300'/%3E%3Ccircle fill='%230e0e0e' cx='0' cy='0' r='200'/%3E%3Ccircle fill='%23000000' cx='0' cy='0' r='100'/%3E%3C/g%3E%3C/svg%3E");
    background-attachment: fixed;
    background-size: cover;
}