The green is the chlorophyll, always best, to use dried cured bud for this, as you may get fat eating all the starch in the chlorophyll ...jk...lol!
actually I find bud that has mold bud rot to be the best to make oil out off, still you may not notice or make that taste, (like eating fan leaves) and can adapt it to your culinary skills ..too!
My question is does the brown-ish color of the leftover weed make a difference in the cannabutter is it good or bad?
All I see here is green, as per above, use a water cure to remove as much starch(green/brown) as you can first
ps you just reminded me ..I got some canna rice in the microwave ...Yuumm!