.gradient {
     background: -webkit-radial-gradient(center center, rgb(RR, GG, BB) 0%, rgb(RR, GG, BB) 100%);
     background: -moz-radial-gradient(center center, rgb(RR, GG, BB) 0%, rgb(RR, GG, BB) 100%);
     background: -ms-radial-gradient(center center, rgb(RR, GG, BB) 0%, rgb(RR, GG, BB) 100%);
     background: -o-radial-gradient(center center, rgb(RR, GG, BB) 0%, rgb(RR, GG, BB) 100%);
     background: radial-gradient(center center, rgb(RR, GG, BB) 0%, rgb(RR, GG, BB) 100%);
}