Lets look at this logically
Large Gorillas, fighters, so we would be talking about the big male silverbacks. Therefore we are going to be looking at extremelly dark brown merging to black for any skin/fur etc that is visble in the miniature. Have to check reference pics but I would envisage silvery white highlighting on the fur to give it the "silverback" tones.
Now we are looking for some large elements in nice contrast. The shields are a good focal point, and they almost beg to be done on bronze from the greek style that they have. Basecoat silver, pick out the raised parts in gold and give the gold a chestnut wash to darken and enrich. This scheme will most likely be used for all the metalic parts (gold hilt, steel blade on the sword and also for the large decorative platelets on the belt, steel with a bronze rim for the helmet).
From what I can see, another stand-out feature is the gambeson or undershirt (difficlut to see from a picture.) I would be looking for a nice scarlet for this, with purple trim. Think Trojan cloaks.
The final section is that segmented armour. I at first thought steel, but then decided to carry through on the greek idea and we start looking at leathers. With the darkness of the facial features and the vivd red of the undershirt, I would probably be looking at a light tan colour on a slightly darker backing.
I cannot tell from the pics if the arms are covered in greaves or fur. If grieves then we would be looking at leather for those too.
