Choose a harmonious combination of  colors is the basis of any design project

Here are the best ways to choose a color scheme:

Adobe Colour CC

Lets try, create and save various color schemes, each of which is constituted by a set of five colors. In the desktop version, you can export a combination of colors directly in Photoshop, Illustrator and InDesign.

The color app

Lets you sample colors, discover the RGB values HEX and HSLA and creating color palettes to see how they work together. IOS app.

Mudcube Colour Sphere

Not only it provides the hexadecimal numbers for each color; but also it helps to build a color scheme from a chosen shade.

SpyColor

SpyColor.com is a free service that provides information about any color, including conversions to many color models (RGB, CMYK, and many others). Find your schemes as complementary, split complementary, triadic, tetradic, five-tone, clash, analogous and monochromatic colors can be found in every color page.

Hex Color Scheme Generator

Instrument for the generation of colors that work in conjunction with a reference to the existing color you. Just paste in a hexadecimal color value, and the tool will return a set of pleasant colors that can be used with the base color and feel like a deliberate decision issue.

COLOURlovers

COLOURlovers is a planned community around sharing and appreciation of colors, palettes and patterns.

Color Scheme Designer

Online tool that provides an output similar to Adobe Kuler, but has some interesting ways of generating color themes, allowing you to choose between the brightness schema / saturation and contrast rather than selecting individual colors that make up the system.

ColorZilla

ColorZilla is an extension for Google Chrome that includes a number of instruments relating to color, including a color picker, eyedropper, CSS gradient generator and palette browser.

ColorBlender

Simple but very functional tool, this site allows you to grab a sample, adjust the color and watch in real time as it generates a set of five colors that work in combination. Palettes can be downloaded directly from Photoshop, Illustrator, or in the form of an EPS file.

Stripe Generator 2.0

Useful for generating pleasing color combinations, and to generate eye-popping patterns, at the same time!

Colors on the Web

Accepts a single color in hex or RGB, and provides a set of patterns based on different mathematical equations, similar to Kuler.

ColoRotate

Functionality similar to Kuler, but with a good 3D display of the color wheels, and the ability to generate more than five colors in a single scheme. This tool is also available as an iPad app, which offers a nice integration with Photoshop where it can act as a ‘color console’.