While optical fibers can technically transmit a wide range of wavelengths, their efficiency varies depending on the color. Fibers are designed with specific core materials and dopants optimized for certain wavelength ranges. For instance, standard telecom fibers are optimized for near-infrared wavelengths (around 1300 nm and 1550 nm) used in data transmission. While they can still transmit visible colors, the attenuation might be higher, leading to dimmer or distorted colors. Specialized fibers designed for specific color ranges exist, but they are less common and might have higher costs.