Whoa. This was a tough one. It really had me struggling. The hues were difficult to discern and it was frustrating. There was a lot to figure out (the harmonica to the right was metal on plexiglass, the other two traditional models). The colours were odd when I tried to pin them down - not silver, not gold, not brass....just a mix of reflective metallic tones. I'm going to have to study this subject again and again to get a better handle on it.