It depends on what reference pic you're using.
You see in the end it's up to you to decide.
My girlfriend always mourns when I ask her what colour to use, or when I'm upüset that the color isn't 100% like in pictures. And I guess she's right. You can't choose a color with a hundred percent accuracy, there will ALWAYS be some differences. But at least you must wear it with pride. Even "brown Teddiursa" cosplayer wear there costumes with bride becuase to them, Teddiursa IS brown. So Cosplay is like philosophy: There's no wrong and no right! I always make my decisions based on facts like practicability, functionality and my personal opinion.
And my personal opinion tells me that Teddiursa is ochre