All About Color: Articles about use of color and the psychology of color from Pantone.
Color Matters: Explores the physiological and psychological effects of color and how it affects appetite, vision, sexuality, energy conservation and its relationship to architecture and interior design.
Color Psychology: Color reaction, test, chromotherapy, color and environment and research.
ColorSpeak: User-generated interactive database of color meaning and symbology.
Computerized Simulation of Colour Blindness: What do colour-blind people see? Interactive Java applets to demonstrate colour appearance.
Natural Color System: Color communication in architecture, design, manufacturing, marketing, research and education. This international color order system is entirely based on how the human being perceives color.
The Colour Group of Great Britain: An interdisciplinary society for those concerned with colour measurement, reproduction vision, and perception, with colour in lighting, architecture and art.
The Meaning of Color for Gender: The Meaning of Color for Gender paper, by Natalia Khouw. Includes numerous references on subject and contact information
The Psychology of Color and Sound: Teachers.Net Lesson Exchange for public school teachers.