20 Color Scheme Generators for Web and Graphic Designers
http://www.youthedesigner.com/2011/04/05/20-color-scheme-generators-for-web-and-graphic-designers/

Color Scheme Designer is an interactive tool for designing harmonious color schemes that lets you drag a scale around a color wheel to select your hues, adjust the scheme and then export the hex codes into HTML, XML or text.

http://colorschemedesigner.com/

Check My Colours is a tool that examines the contrast ratio and brightness difference of your web pages. It also checks foreground and background color combinations of all DOM elements and determines if they provide sufficient contrast when viewed by someone having color deficits.

http://www.checkmycolours.com/

ColorJack is an online Color Scheme Generator. To create fresh color schemes of anywhere from two to six colors that complement, clash, or neutralize, all you have to do is to navigate your mouse into the sphere.

http://colrd.com/

ColourMod is a Dashboard widget that can be used on a website to let users dynamically change stylesheet colour settings.

http://colourmod.com/

ColoRotate is a 3D tool that easily create palettes and manipulate colors in 3D space for better control of foreground and background colors.

http://mobile.colorotate.org/

Contrast-A allows users to interact with a 3-dimensional RGB color space to experiment with color combinations.

http://www.dasplankton.de/ContrastA/

Kuler is a free web-hosted application where designers create and share color themes. It allows you to experiment quickly with color variations using an advanced yet simple to use interface and browse tons of pre-made color schemes.

https://kuler.adobe.com/create/color-wheel/

ColourGrab allows people to download any image online and then get the color breakdown.

http://colourgrab.com/

Pro Color Palette is a software from Colourlovers that has a photo tool to extract colors from an image, a color picker and color theory wheel, and it lets you save the colors you’ve been working with.

http://www.colourlovers.com/copaso/ColorPaletteSoftware

COPASO is an advanced color palette tool that helps you create the perfect color palette. If you’re finding COPASO a bit too rich for your color creating tastes, you can always use our basic color palette tool.

http://www.colourlovers.com/copaso

Color Explorer is a free tool that will help you to choose the colors of your homepage.

http://colorexplorer.com/

Pictaculous is a handy color-palette generator that lets you extract a palette of colors from any image. Pictaculous takes an image of your choice and generates an excerpt of colorized palettes founded off of them.

http://www.pictaculous.com/

Color Hunter is an online resource that allows you to identify colors from any image and make color palettes from there.

http://www.colorhunter.com/

colorZilla is a Mozilla extension that helps web developers and graphic designers to get the hexadecimal values for colors with just a click of their mouse.

http://www.colorzilla.com/firefox/

Color Wizard is a web-based application that lets you submit your own base color, and it automatically returns matching colors for the one you selected.

Kolur is a simple (and hopefully) enjoyable way to browse color palettes.

http://www.kolur.com/

The color Wheel is an online application that lets you select just the right shade for your web site and generate the HTML color code.

http://www.colorsontheweb.com/colorwheel.asp

ColorMunki is an all-in-one color solution that gives you the freedom to design with any color from the visible

http://www.colormunki.com/munsell

Colorspire is a tool that has a flexible color picker and color wheel which enables you to select a color scheme for a website project.

http://www.colorspire.com/

Color Schemer Online v2 is a online instant color scheme generator that allows you to use if you want to develop a matching color scheme for your website.

http://www.colorschemer.com/online.html

Infohound Color Schemer is a simple tool that helps you experiment with various color schemes for your next web or print project.