Introducing 'Rudy' my new Rudis Chameleon

[dtork]

Here is 'Rudy' my new Rudis Chameleon. I posted a picture of his girlfriend 'Amelia' in another thread. I wanted to ask about is frequent color changes and what you all think of him and what his colors mean. He is sometimes green with yellow sides, sometimes chocolate brown and sometimes olive green and brown. Can anyone interpret the colors in these pictures? This is the same chameleon in all three pictures

http://imageshack.com/a/img922/6958/d1ST2f.jpg

http://imageshack.com/a/img922/4816/oNYxk5.jpg

http://imageshack.com/a/img924/6184/0sAQsD.jpg