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<!DOCTYPE html> <html> <body> <canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;"> Your browser does not support the HTML5 canvas tag.</canvas> <script type="text/javascript"> var c=document.getElementById("myCanvas"); var ctx=c.getContext("2d"); var grd=ctx.createLinearGradient(0,0,170,0); grd.addColorStop(0,"black"); grd.addColorStop(0.5,"red"); grd.addColorStop(1,"white"); ctx.fillStyle=grd; ctx.fillRect(20,20,150,100); </script> </body> </html>