It's likely each jersey could be as good as safe now. But looking at it another way.
yellow- still got at least 7 stage to go that could have an effect on GC. Still plenty of guys who will give Froome a fight and who aren't done yet. Guys like Contador and Quintana aren't even close to finished. Contador especially won't go down without a fight.
Green- Sagans got a nice big lead with 234 points. But we have 3 flat stages coming up and Cav and Greipel will no doubt be there for them. If one of them won each stage and Sagan loses points to them on each finish and each intermediate the gap between him and them could come down to around 30 points. And sprints are unpredictable, perhaps the most unpredictable aspect of pro cycling.
White- Nairito looks very capable of being in white by Paris, but we also have a TT coming up. And Kwiatkowski is only 1:23 back, which he is very capable of making up in the TT. And if he can stay strong in the climbs and not lose too much he just may be able to hold white.
Polka dot- Still got 4 big mountain stages coming up and plenty of points too be gained. Froome or Quintana or maybe even someone else if they really dominate the coming mountains stages could close the gap to Rolland.
Now are any of these really likely to occur, not really. I expect Froome will probably keep yellow; green is likely to stay with Sagan as long as he stays consistent; Quintana may lose white in the TT but I think will end up taking it back in the mountains; and, like Sagan, as long as Rolland stays consistent on the climbs he should be able to keep his lead. But the point is that nothing is set in stone at this point.