Not sure if anyone has done this before me, but Rit dye has an option on the website where you can request a formula for a specific color. I sent them the high resolution screenshot of the scene where Michael grabs the kid that was bullying Tommy (Can’t remember the name,some fan, right?). I heard back from the “Dye Doctor” and the formula to get the closest color dye to the original coveralls is a full bottle of teal, full bottle of emerald, and 1/4 bottle of flame. I will try the formula and post results soon. Thanks for reading.
tl;dr- use teal, emerald, and flame to get the correct color coveralls in HalloweeN