Treehouse

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!

ydkjs-3.png

Recent Features

  • Creating Scrolling Parallax Effects with CSS

    Introduction For quite a long time now websites with the so called "parallax" effect have been really popular. In case you have not heard of this effect, it basically includes different layers of images that are moving in different directions or with different speed. This leads to a...

  • 6 Things You Didn&#8217;t Know About Firefox OS

    Firefox OS is all over the tech news and for good reason:  Mozilla's finally given web developers the platform that they need to create apps the way they've been creating them for years -- with CSS, HTML, and JavaScript.  Firefox OS has been rapidly improving,...

Incredible Demos

  • Full Width Textareas

    Working with textarea widths can be painful if you want the textarea to span 100% width.  Why painful?  Because if the textarea's containing element has padding, your "width:100%" textarea will likely stretch outside of the parent container -- a frustrating prospect to say the least.  Luckily...

  • CSS Animations Between Media Queries

    CSS animations are right up there with sliced bread. CSS animations are efficient because they can be hardware accelerated, they require no JavaScript overhead, and they are composed of very little CSS code. Quite often we add CSS transforms to elements via CSS during...

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?

  6. […] Color Palette Generator Using jQuery […]

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