I think I'll try and remove it and start again, then leave it; it will ahve cost me more in dye than the smock!!
I know about working out how something was done and trying to replicate it ... it's a pita which, occasionally, can give joyous results
I remember someone doing a smock in antique grey a few years back, it looked good but I'm not sure who it was
. Unless you're set on green or brown it might be worth redoing the antique grey ~ because you'll have lost a bit to the blanket in the first go it's likely to out a bit paler than the box swatch (unless, that is, you use two sachets).
Which colour are you considering? You'll only really need to pull the colour out if you intend to go with a pale or washed out effect (single sachet) finish.
I've recently started modding a snow smock and I went for a full block* colour on the basis that it'll (hopefully) wash back to what I want ~ all colours fade with washing.
* Correct quantity of dye for garment(s) weight
It's a bit in your face atm but I opted for a hiding in plain sight theme and, as mentioned above, it should fade down to become nicely muted and unobtrusive. Adding waterproofing or a water repellant would darken it up nicely.