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Editorial Team
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Asked: 2026-05-26T02:57:06+00:00

I want to know how to make a color picker with jQuery that will

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I want to know how to make a color picker with jQuery that will allow you to click somewhere on the page and return the hex color value of the color that you clicked on.

I know that it is possible with either javascript or jquery as not only do they have lots of color picker plugins, but I have and extension for Chrome that has that same exact functionality.

Any ideas?

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1 Answer

  1. Editorial Team

    Bind a global click or mouseup event listener. Then, use canvas to obtain the pixel information. The pixel positions can be retrieved through the event object (event.pageX, event.pageY).

    See below for an example, which should work in future versions of FireFox. Currently, for security reasons, the drawWindow method is disabled for web pages. It should work in extensions, though. If you’re truly interested, see the links for the similar methods in Chrome, Safari and Internet Explorer.

    var canvas = $("<canvas>"); //Create the canvas element

//Create a layer which overlaps the whole window
canvas.css({position:"fixed", top:"0", left:"0",
            width:"100%", height:"100%", "z-index":9001});

//Add an event listener to the canvas element
canvas.click(function(ev){
    var x = ev.pageX, y = ev.pageY;
    var canvas = this.getContext("2d");
    canvas.drawWindow(window, x, y, 1, 1, "transparent");
    var data = canvas.getImageData(0, 0, 1, 1).data;
    var hex = rgb2hex(data[0], data[1], data[2]);
    alert(hex);
    $(this).remove();
});

canvas.appendTo("body:first"); //:first, in case of multiple <body> tags (hmm?)

//Functions used for conversion from RGB to HEX
function rgb2hex(R,G,B){return num2hex(R)+num2hex(G)+num2hex(B);}
function num2hex(n){
    if (!n || !parseInt(n)) return "00";
    n = Math.max(0,Math.floor(Math.round(n),255)).toString(16);
    return n.length == 1 ? "0"+n : n;
}

    References

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