Yes, I think they're all dropping with the probable exception of red/white/black unless an uber knows otherwise.
Although Dark Blue stopped dropping from fungoids when I was last hunting them quite a bit. Don't know if that's still the case, or if something else drops it now.
One thing to bear in mind is that the news from MA regarding the next VU reported big changes to avatar appearance and clothes. So paint may feature in that too possibly...
No change for me, orange..yellow..blue...mauve...green etc all usual mobs and usual amounts. Up to a few days ago at least, not hunting mobs that drop paint ATM.
question is if they are outplementing the old colors and its gonna come new onces or if these colors will start dropping with a higer Frequency.
either way prices will prolly drop a bit