Color Fields is a short listed proposal for a public art project in West Sacramento, California, along a newly developed riverfront park near the city center. The project employs a series of physical sculptures dispersed through the River Walk that are animated by colorful LED Lighting. The principal concept of the project is to tie together the physical (permanent), and the perceptual (ephemeral) aspects of its design through an integral approach to its lighting design. The physical sculpture is a lightweight shell-like structure of repeating modules that form a ribbon of Moiré surfaces creating an animating pattern as one moves through and around. Additionally the sculpture is illuminated by only three colored lights, Red, Green, and Blue, as the light is projected through the installation the colors are selectively mixed in the shadows of other lights creating a spectral pattern of colored shadows that is continually changing as lights pulse on and off.