I used platinum on the gray areas(armor, castle), the white areas (swan, skirt, clouds) are silver
pink is rose gold, copper is brown(boat ,belt, cattails)
In general I try to avoid metals that tarnish, but sometimes it is unavoidable, as in this case when you need bright white and brown.
Though this kind of inlay takes a bit of planning out as it is, the real factor of complexity, was the radius on the floorplate. It had roughly an 1.5" radius. So that not only increased the difficulty for the actual setting of the inlays, it also made it necessary to distort the image so it would look correct when viewed straight on.