As I mentioned in passing yesterday, I had some non-results with dried walnut on one of my overdye projects. I can’t remember what came first, I think possibly alum and St. John’s Wort solar dye method (= mucky fawn).
Then I tried dried walnut shells, bought in a store, not collected, regrettably. (=beige) Ammonia: no change. Yes, it really lost colour compared to the original.
Another option would be mixing my used dye jars of hollyhock, cochineal and safflower on the odd chance they were not exhausted from the other hanks I showed yesterday. (=this added a slight greyish tint to the beige)