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copied!<p>Here's a complete, self-contained example. First, use the following HTML:</p> <pre><code><canvas id="example" width="200" height="60"></canvas> <div id="status"></div> </code></pre> <p>The relevant JavaScript:</p> <pre><code>// set up some sample squares var example = document.getElementById('example'); var context = example.getContext('2d'); context.fillStyle = "rgb(255,0,0)"; context.fillRect(0, 0, 50, 50); context.fillStyle = "rgb(0,0,255)"; context.fillRect(55, 0, 50, 50); $('#example').mousemove(function(e) { var pos = findPos(this); var x = e.pageX - pos.x; var y = e.pageY - pos.y; var coord = "x=" + x + ", y=" + y; var c = this.getContext('2d'); var p = c.getImageData(x, y, 1, 1).data; var hex = "#" + ("000000" + rgbToHex(p[0], p[1], p[2])).slice(-6); $('#status').html(coord + "<br>" + hex); }); </code></pre> <p>The code above assumes the presence of jQuery and the following utility functions:</p> <pre><code>function findPos(obj) { var curleft = 0, curtop = 0; if (obj.offsetParent) { do { curleft += obj.offsetLeft; curtop += obj.offsetTop; } while (obj = obj.offsetParent); return { x: curleft, y: curtop }; } return undefined; } function rgbToHex(r, g, b) { if (r > 255 || g > 255 || b > 255) throw "Invalid color component"; return ((r << 16) | (g << 8) | b).toString(16); } </code></pre> <p>See it in action on JSFIDDLE:</p> <ul> <li><a href="http://jsfiddle.net/DV9Bw/1/" rel="noreferrer">http://jsfiddle.net/DV9Bw/1/</a></li> </ul>

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