this is the best sentence so far, i love it. never going to forget the word for yellow now
I audibly "aww'ed" when I read this sentence because in my mind I imagined something basically like that image. Just a cute little turtle in a cute little yellow hat...
I always imagined it as either a construction worker's hard hat to go with the hard shell or a sea fisherman's water proof hat because the turtle lives in the sea.
The one turtle that I know from my own childhood cartoons had a white hat! http://p6.storage.canalblog.com/65/97/466416/55463116.jpg
my guess was that hatt might also nean shield and gul is brown.. gotta drink some coffee after waking up before duolingo.. ;)