Colors!

Thanks all for the work on the sphinx theme. I'm curious about how we're choosing colors here. For example in our configuration reference I'm seeing the following:


Are these intentional (from a pallete somewhere?) or are we just deferring to the underlying theme? If the latter, should I just make modifications as I see fit, or do we want to consult something grander (if anyone else wants to take this away from me I'd be happy for it)