What are the other conditions for the hijab besides covering the hair, neck, and chest, and is it permissible to use two colors for the head covering if their colors do not cause temptation?

A woman must cover her entire body except for her face and hands, and she must cover them too if there is a fear of temptation. There is no specific color required for the garment, nor is it required that all pieces be of one color. Rather, the condition is that it should not be provocative or a cause of temptation.