I was thinking maybe smoked black or something that rather blends with the wood. Maybe an inlay using two combinations.
What I was thinking was. A brushed aluminum or titanium, whatever it is, with a black floating logo of spring and winter (in Hanja, just google it if you really want to know) with either an azure or smoked shell.
The smoked shell is always a good choice, especially with a brushed metal/aluminum face plate. But it's up to your personal tastes really. I think the inlay's are really ugly. If the two different materials were blended together in a design that was more aesthetically pleasing than just stripes.