Why If I had to guess it's probably the same color paint. However the ceramic bezel in each instance is a gold bezel of the appropriate color with ceramic over the top. The ceramic color red would then
link be inlaid into the "100" and it's likely thin enough to be influenced by the material underneath. That's my bet at least. Some people in the office thought there was a chance that the red on the dial of the yellow-gold model was a bit darker
link too but I couldn't
link verify that.