My new tree decided to give me a really pretty leaf just before winter. What a cool plant.
I think it has something to do with how much light the tree gets. I just got into house plants this year but I noticed my dark leaved rubber tree becoming more green so I moved it to a brighter spot and now its turning darker again. Maybe yours wants more light as well?
I regret not getting one of these when my local greenhouse had them. They remind me of my panda plant I love.