You're right, Smoltz ... you don't hear yellow being talked about, all that much. Not sure why
It's not a particular favorite of mine, either. But, there was one year that yellow/chartreuse was the "flavor of the month", down on Watts Bar Lake in East Tenn. My fishing bud & I bought some yellow/char tubes, while we were there, and did catch some fish on them. But, we haven't caught any on them since then, neither down there or anywhere around here ... so we don't buy or use them anymore.
Yellow will catch fish, we proved that, but purple/char - blue/char - pink have outproduced most all other colors/combos for us, so that's what we use.