What color morph is my new acf?

[rupertxgiles]

Just got this little dude 2 weeks or so ago on Craigslist. He was very thin, a dark greenish brown color, and the previous owner claimed she had heard him sing once or twice so i knew it was male. He is 2 years old yet had no nuptuial pads so i was very confused. She told me she fed him once a week or less, only a few teeny sinking pellets each time. Now that hes been with us , hes suddenly changed to a much lighter color, sings every night, has gained weight and has nuptuial pads! My question is what color type is he considered?