Working on a new build for a winter bike now, I was browsing for parts and, for a fleeting moment, considered laying $120 for a KMC X11 DLC chain in black/blue.
Would've looked sweet, but then I thought, "WTF am I thinking?! That's twice what I'd pay for the same chain in plain silver, and it's just gonna get grimy anyway." Whew...my senses kicked in.
Were I a wealthier man, it might have looked a little different, but still...everyone's chain gets grimy, especially on a bike meant for wet and sloppy conditions, right?
Conclusion: colored chains are ridiculous, especially in this case, but probably always ( though I do have a gold X11 on another!).
On what else can you spend silly money for nothing more than cosmetic improvents? What's the silliest piece of adornment you can imagine slapping on your bike?