I consider myself an ultralight purist, but I can't imagine that we are talking more than a few grams for actual color.
Now flame retardant? It is worth noting and it can be heavy; and it is NOT on my tents. It is why RAB had to market the Summit Mountain Bivi (with eVEnt) as such: 'bivys" rather than tents due to no recommended cooking or heating inside...
Two man, three pounds+ and completely bombproof.