I gave up camo this year as well, had more deer under my stand than any previous year.
Sportsman guide had a DEAL on gray east German military pants about a year ago, 4 pair for $29. These are very well made, mid weight and generously cut for extra comfort. The pants color is is gray but has a unique oak tree bark tint of gray, blends perfectly with the woods.I have been machine washing them in cold water on a gentle cycle with no shrinkage.
Here a picture of the pants I bought that I snagged off the auction site. Not me in the picture, my waist hasn't been that small since 1967.
I didn't need 4 pair so I sold two of them, put one new pair back to use when I wear out pair #1. Don't think I will wear out pair #1 in the near future as they are made to last.
Sportsman's Guide quit carrying these pants but they are still available on the auction site last time I looked but not at the giveaway price I bought mine at.