How does the mane and tail of a true black horse appear in direct sunlight?

The appearance of a true black horse’s mane and tail in direct sunlight is described as looking blue due to the way light interacts with the horse's dark coat. This phenomenon occurs because black coats can have a bluish sheen when light reflects off the hair, especially under bright sunlight. This bluish tint is more pronounced in certain lighting conditions, giving the impression of a deep, rich color that can resemble blue shades.

In contrast, other colors listed, such as brown, red, or yellow, would not typically apply to a true black horse. The deepness of a true black coat absorbs most colors of light, and under specific lighting, it may create the bluish effect rather than revealing any warmth typical of chestnut or bay horses. Understanding this unique characteristic adds depth to the knowledge about equine color and its visual perception in various environments.