Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <style> #grad1 { height:150px; width:150px; background: -webkit-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Safari */ background: -o-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* For Opera 11.1 to 12.0 */ background: -moz-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* For Firefox 3.6 to 15 */ background: radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Standard syntax (must be last) */ } #grad2 { height:150px; width:150px; background: -webkit-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Safari */ background: -o-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* For Opera 11.1 to 12.0 */ background: -moz-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* For Firefox 3.6 to 15 */ background: radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Standard syntax (must be last) */ } #grad3 { height:150px; width:150px; background: -webkit-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Safari */ background: -o-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* For Opera 11.1 to 12.0 */ background: -moz-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* For Firefox 3.6 to 15 */ background: radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Standard syntax (must be last) */ } #grad4 { height:150px; width:150px; background: -webkit-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Safari */ background: -o-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* For Opera 11.1 to 12.0 */ background: -moz-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* For Firefox 3.6 to 15 */ background: radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Standard syntax (must be last) */ } </style> </head> <body> <h3>Radial Gradients - Use of different size keywords</h3> <p><strong>closest-side:</strong></p> <div id="grad1"></div> <p><strong>farthest-side:</strong></p> <div id="grad2"></div> <p><strong>closest-corner:</strong></p> <div id="grad3"></div> <p><strong>farthest-corner (this is default):</strong></p> <div id="grad4"></div> <p><strong>Note:</strong> Internet Explorer 9 and earlier versions do not support gradients.</p> </body> </html>
Result:
W3Schools.com - Try it yourself