MYTAKE responded to my comment: “If Hashem wanted to, He could of just made it a halacha that women can only wear black”.
It seems you missed my point! If there would be a halacha that all women must wear only black many women would have a problem with it, because it’s a halacha and it brings with it a yezer hara of difficulty. Instead, Hashem did us the favor to make it the style that everyone should wear black so that most people should be comfortable doing so. Maybe it’s part of His way of making it easier for us to do what’s right.