What are the three primary colors of light, and what happens when they are combined? Red, green, and blue are the primary colors and they can be combined in different proportions to make any color of light that is visible to the eye. O Red, pink, and orange are the primary colors and they can register in our brains as any color of light visible to the eye when they are combined in different proportions. O Blue, orange, and brown are the primary colors and when they combine we always see white light in an astronomical image. O Ultraviolet, infrared, and visible are the three primary colors of light and when they combine they produce only visible light. O Ultraviolet, infrared, and visible are the three primary colors of light and when they combine the ultraviolet light dominates because of its higher energy