پارامتر size در شیب رنگ

#grad1
{
/* Safari */
background: -webkit-radial-gradient(60% 55%, closest-side,blue,green,yellow,black);
/* For Opera 11.1 to 12.0 */
background: -o-radial-gradient(60% 55%, closest-side,blue,green,yellow,black);
/* For Firefox 3.6 to 15 */
background: -moz-radial-gradient(60% 55%, closest-side,blue,green,yellow,black);
/* Standard syntax */
background: radial-gradient(60% 55%, closest-side,blue,green,yellow,black);
}

#grad2
{
/* Safari */
background: -webkit-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black);
/* Opera 11.1 to 12.0 */
background: -o-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black);
/* For Firefox 3.6 to 15 */
background: -moz-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black);
/* Standard syntax */
background: radial-gradient(60% 55%, farthest-side,blue,green,yellow,black);
}