yea, believe it or not i had some Vanilla kush my friend swore up and down was stress when he looked at it in the bag he was askin me how i got stress to nug out so huge lol i was all dood its not stress its been cured 6-8 months lol i had this lid FOREVER, it turned straight BROWN gold colored you know almost how vanilla actually looks raw lol. Smokin that lid was AWESOME tasted so bomb after that long. Yea color change is normal because curing is the process of breaking down remaining chloryphyll in the nugs, hence the browner color as they cure up.