My pants started out a very light tan. I hit them with taupe and tan originally (I find that taupe is coming out more grey than tan for me), then a touch of just taupe later, I think. I sadly didn't write down my exact combos of dye, and it was a trial and error thing, so I'm not a huge help with the specifics, but honestly, the color is hard to match and your fabric is going to be different than mine. So, if you can, do a test dye batch first. And remember that you can always dye them again/make them darker, but you can't easily make them lighter/take dye out. Yes, you can bleach or use dye remover, but...it's not great. Doing multiple shorter times and weaker dyes is generally better. If they're too light, then you can dye them again. Too dark, and, well, you're often out of luck.
But if you can, do a test dye of the fabric first to see how it'll come out first. I can't even think of how many times I dyed my scarf fabric before I found the last one (fifteen minutes in a bath of 3 teaspoons taupe only, then dusted with tan spray paint).
