2. The dominant colors of your outfit.
Colors. You can tell a lot about what a person is thinking, feeling, or planning for a particular day based on the color choices of their clothing. If he sees you wearing a bright and sunny dress with a floral pattern, then that might tell him something about your mood for that day.
If he sees that you’re wearing black, then he might think that you’re in a more sultry and serious mood than usual. He uses your color scheming to sort of gauge where your mood is at during a particular time.