Milo is my pet. He is lovely cat. He is not an expensive cat. I found him in front of my house. Though he is not pricey cat, I love him so much. Milo has long whiskers and green eyes. He is orange with two gradations of colors. He is not fat though he eats a lot because he is very active. He likes to play with balss, but his favorite toy is a ball of yarn. He likes to roll it and then chase it. Once he catches it, he throws it from one of his front paws to the other one. At night, he always sleeps with me. How many gradations of colors does the cat have ? *