Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <style> #grad1 { height:55px; background: -webkit-linear-gradient(left, red, orange, yellow, green, blue, indigo, violet); /* For Safari */ background: -o-linear-gradient(left, red, orange, yellow, green, blue, indigo, violet); /* For Opera 11.1 to 12.0 */ background: -moz-linear-gradient(left, red, orange, yellow, green, blue, indigo, violet); /* For Fx 3.6 to 15 */ background: linear-gradient(to right, red, orange, yellow, green, blue, indigo, violet); /* Standard syntax (must be last) */ } </style> </head> <body> <div id="grad1" style="text-align:center;margin:auto;color:#888888;font-size:40px;font-weight:bold"> Gradient Background </div> <p><strong>Note:</strong> Internet Explorer 9 and earlier versions do not support gradients.</p> </body> </html>
Result:
W3Schools.com - Try it yourself