How does this material smell?
What did you use for the "green portion of the heap" and how much did you use?
On the question of microbial life, the answer is somewhat,
compost color is dependent upon 1. materials used, 2. heat acquired in the heap, 3. non fungal organisms present, 4. fungal organisms present.
If you didn't add any manures to the heap it will be less fungal which can lead to a lighter color, type of wood (the clipped branches) can also have some effect on color as can turning the heap. (a heap that is turned to keep the whole thing heating will turn darker than one that isn't turned)
Lack of moisture inside the heap can literally shut down the processes of decomposition and cause any microbes to go dormant, this will lead to a compost look but isn't really compost it is more of a mulch then.
Redhawk