Color Addition

This applet demonstrates how colors can be created using only three colors of light: Red, Green, and Blue. Use this applet to produce other colors by dragging the squares so they overlap, then adjust their relative intensities using the slider bars.

Click and Drag on the color squares to rearrange the pattern.

Use a magnifying glass (lupe) to examine the colors closely. Can you identify the colored elements of the screen?

For more information about how color TV's work, and the source of this applet, see UC Boulder's Physics 2000 Web Site.