Color theory may sound like a subject for the Art Department, not for developers. But we've all had the experience of choosing a color scheme using the property grid to select named colors and ending up with a really garish color scheme…
Crash course in learning theory
Digital Web Magazine - Color: An Investigation
Color Wheel Pro is a software program that allows you to create color schemes and preview them on real-world examples. Click here for color theory basics.
Many web sites all ready use forms. They allow the users of goods or service to register online. Internet shoppers use forms to select, pay and arrange for the delivery of their purchases
An interactive Experience of Color COmmunication and Color Symbolism

Learn how to create perfect pixel patterns with Photoshop!
An Introduction to Using Patterns in Web Design