Color Palette Generator Using jQuery

By  on  

As I continue to learn jQuery, I think it's important that I begin by porting over scripts I've created using MooTools. One of those scripts is my Color Palette Generator script, which debuted on Eric Wendelin's blog. For those of you that missed it, my script analyzes all of the colors on the page (minus images) and builds a palette of colors. Here it is in some jQuery goodness.

The XHTML

<input type="button" id="get-colors" value="Get Colors" class="button" />
<div id="colors-wrapper"></div>

All we need to begin with is the button that triggers the palette generation and a DIV container that will hold all of the DIVs my jQuery creates.

The CSS

.dcolor		{ height:40px; }
.dtext		{  }
.dwrapper	{ width:200px; float:left; padding:10px; margin:0 20px 20px 0; border:1px solid #ccc; }

These CSS classes act as containers for the text DIV I generate and the color-displaying DIV I generate. Those two DIVs are held in one wrapping DIV.

The jQuery JavaScript

/* when the dom is ready */
$(document).ready(function() {
	$('#get-colors').click(function() {  
		
		//my colors array
		var colors = new Array();
		
		//get all elements
		$('*').each(function() {
			if($(this).css('background-color') && $(this).css('background-color') != 'transparent') { colors.push($(this).css('background-color')); }
			if($(this).css('color')) { colors.push($(this).css('color')); }
			if($(this).css('border-color')) { colors.push($(this).css('border-color')); }
		});
		
		//remove dupes and sort
		colors.sort();
		
		//create a color block for all of them
		jQuery.each(colors,function(it,value) {
			
			if(!$('div[rel=\'' + value + '\']').length)
			{
			
				//inject the wrapper
				var wrapper_id = 'w' + it;
				$('<div class="dwrapper" id="' + wrapper_id + '" rel="' + value + '"> </div>').appendTo('#colors-wrapper');
				
				//inject the color div
				$('<div class="dcolor" style="background-color:' + value + '"> </div>').appendTo('#' + wrapper_id);
				
				//inject text div
				$('<div class="text">' + value + '</div>').appendTo('#' + wrapper_id);
			}
			
		});
		
	});
});

When someone clicks the "Get Colors" button, I grab every element in the DOM and collect its color, background-color, and border-color. Once I've cycled through all of the elements, cycle through all of the colors and display them as DIVs inside my colors-wrapper element. You'll note that I utilized the rel attribute to prevent duplicates.

There's the jQuery Color Palette Generator for you!

Recent Features

  • By
    9 Mind-Blowing Canvas Demos

    The <canvas> element has been a revelation for the visual experts among our ranks.  Canvas provides the means for incredible and efficient animations with the added bonus of no Flash; these developers can flash their awesome JavaScript skills instead.  Here are nine unbelievable canvas demos that...

  • By
    5 Ways that CSS and JavaScript Interact That You May Not Know About

    CSS and JavaScript:  the lines seemingly get blurred by each browser release.  They have always done a very different job but in the end they are both front-end technologies so they need do need to work closely.  We have our .js files and our .css, but...

Incredible Demos

  • By
    Scrolling &#8220;Agree to Terms&#8221; Component with MooTools ScrollSpy

    Remember the good old days of Windows applications forcing you to scroll down to the bottom of the "terms and conditions" pane, theoretically in an effort ensure that you actually read them? You're saying "No David, don't do it." Too late -- I've done...

  • By
    dat.gui:  Exceptional JavaScript Interface Controller

    We all love trusted JavaScript frameworks like MooTools, jQuery, and Dojo, but there's a big push toward using focused micro-frameworks for smaller purposes. Of course, there are positives and negatives to using them.  Positives include smaller JS footprint (especially good for mobile) and less cruft, negatives...

Discussion

  1. bazztrap

    Can you include this script as part of GreeseMonkey .. that would be great

  2. I just coded up an example in jQuery on how to create div overlays over radio buttons to create a compact, interactive but simple color selector plug-in for jQuery. Feel free to check it out if it would be helpful :)

    http://blarnee.com/wp/jquery-colour-selector-plug-in-with-support-for-graceful-degradation/

  3. chris

    nice work. doesn’t grab the colors out of images included on the page. (this may not be possible with cross-browser javascript; just an observation.)

  4. Would love to see a version of this that converts the rgb results to hex.

  5. bonox

    Nice work, is it possible generate pallete from another web site?

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!