I use chartreuse line as does fishdoc. Some time ago I read in a crappie book or saw in a crappie video where they were saying that it can actually help in that the crappie might see the line first which gets their attention and makes it easier for them to see the jig that is coming along. Every single one of the 3,705 crappie I caught last year were caught with chartreuse line. (I use Sufix Elite Hi-vis yellow which I call chartreuse)