This is a neat little online quiz that tests your ability to differentiate subtle differences between gradations in color. If you're a designer this should especially interest you.

Try it out (made by X-Rite)

via HOW

About the author of this post

Abduzeedo is a blog about design. There are all sorts of articles for those who want to look for inspiration. Also you will find very useful tutorials for the most used applications out there, with a special selection of Photoshop Tutorials and Illustrator Tutorials. Of course there are other softwares conteplated like Pixelmator, Fireworks, and web design tutorials.