Elliptical Gradient
div {
background-image: radial-gradient(center bottom, ellipse cover, #ffeda3, #ffc800);
background-image: -o-radial-gradient(center bottom, ellipse cover, #ffeda3, #ffc800);
background-image: -ms-radial-gradient(center bottom, ellipse cover, #ffeda3, #ffc800);
background-image: -moz-radial-gradient(center bottom, ellipse cover, #ffeda3, #ffc800);
background-image: -webkit-radial-gradient(center bottom, ellipse cover, #ffeda3, #ffc800);
}
Circular Gradient
div {
background-image: radial-gradient(center center, circle cover, #ffeda3, #ffc800);
background-image: -o-radial-gradient(center center, circle cover, #ffeda3, #ffc800);
background-image: -ms-radial-gradient(center center, circle cover, #ffeda3, #ffc800);
background-image: -moz-radial-gradient(center center, circle cover, #ffeda3, #ffc800);
background-image: -webkit-radial-gradient(center center, circle cover, #ffeda3, #ffc800);
}