Dying Superwash Wool

I picked up some yarn today to start Marnie MacLean’s Bellocq stockings. The pattern is great so far, but the yarn I picked is turning out to be a lot more yellow and peach than I expected. What I liked about the yarn in the first place is the brown/gray tones, so I’m wondering if there’s a relatively easy way to carry brown or gray across to the yellow and peachy areas. The end result doesn’t need to be uniform, but I’d like it to be near monochrome.