Final answer:
The fovea, located within the retina, contains only cones and is responsible for detailed color vision.
Step-by-step explanation:
The part of the eye that contains only cones and provides detailed color vision is the fovea, which is a small indentation in the back of the eye within the retina. The cones are specialized photoreceptor cells that work best in bright light conditions and are very sensitive to acute detail. They provide tremendous spatial resolution and are directly involved in our ability to perceive color. The retina itself is the light-sensitive lining of the eye where both rods and cones are located, but it's in the fovea where the cones are densely packed, contributing to our sharp central vision.