Quote from the GLEH (Georgia) 2008 edition
40-8-34 Color of Lighting Equipment
The color of all lighting equipment covered in this title shall be in accordance with Society of Automotive Engineers (SAE) Standard J578 April 1965 as thereafter revised or amended .

Other Ga laws pertaining: 40-8-20,21,22,29,30,31 none of which prohibits colors on headlights or any other color as long as it is adjustable beam, meets SAE standards and can be dimmed if dual filiment. Lots of other interesting stuff in the above mentioned codes. Too much to list, they are available online search the 40-8-%% ga law code.