Yin and Yang

About
Yin and Yang are two stallions meant to resemble the "yin and yang" symbol. One has a white coat with a black mane and tail, sporting a green necklace with the yin and yang symbol on it. The other is a black horse with a white mane and tail; he also has a yin-yang symbol, but on his forehead. They both have a single braid, one has it on his mane and the other on his tail, in the same color as their coat.

Name meaning
Yin and yang, in Chinese philosophy, is a concept of dualism where two seemingly opposite forces are actually complementary.