I agree with no lume at all if you are looking for 100% accuracy to the genuine (non replaced) dial. However, it's really about taste, to me, I like my watch to be quite practical, to be able to see it in the dark is a good one to go. So here it is:
daytime colour:
It's even brighter than the gen replacement dial (with C1 lume) . Anyway, if you get an L Swiss L replacement dial, it should have white colour. Rolex didn't use other lume powder colour. I may even suspect that they mix the C1 lume with small amount of tritium.