Используйте Gradient
background: rgba(231,56,39,1);
background: -moz-linear-gradient(45deg, rgba(231,56,39,1) 0%, rgba(240,47,23,1) 29%, rgba(246,41,13,1) 48%, rgba(246,41,12,1) 49%, rgba(241,111,92,1) 50%, rgba(248,80,50,1) 100%);
background: -webkit-gradient(left bottom, right top, color-stop(0%, rgba(231,56,39,1)), color-stop(29%, rgba(240,47,23,1)), color-stop(48%, rgba(246,41,13,1)), color-stop(49%, rgba(246,41,12,1)), color-stop(50%, rgba(241,111,92,1)), color-stop(100%, rgba(248,80,50,1)));
background: -webkit-linear-gradient(45deg, rgba(231,56,39,1) 0%, rgba(240,47,23,1) 29%, rgba(246,41,13,1) 48%, rgba(246,41,12,1) 49%, rgba(241,111,92,1) 50%, rgba(248,80,50,1) 100%);
background: -o-linear-gradient(45deg, rgba(231,56,39,1) 0%, rgba(240,47,23,1) 29%, rgba(246,41,13,1) 48%, rgba(246,41,12,1) 49%, rgba(241,111,92,1) 50%, rgba(248,80,50,1) 100%);
background: -ms-linear-gradient(45deg, rgba(231,56,39,1) 0%, rgba(240,47,23,1) 29%, rgba(246,41,13,1) 48%, rgba(246,41,12,1) 49%, rgba(241,111,92,1) 50%, rgba(248,80,50,1) 100%);
background: linear-gradient(45deg, rgba(231,56,39,1) 0%, rgba(240,47,23,1) 29%, rgba(246,41,13,1) 48%, rgba(246,41,12,1) 49%, rgba(241,111,92,1) 50%, rgba(248,80,50,1) 100%);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#e73827', endColorstr='#f85032', GradientType=1);
height:100px;
width:100px;
И эта ссылка http://jsfiddle.net/bipin_kumar/37fnW/1/
Хорошая идея! Спасибо чувак! –