CM, tying together "boring" colors is overrated. It's brown. It goes with everything a sensible dresser would wear with a brown coat. Also, lightly-draping tan trousers with bright repp ties are tough for me outside of the height of summer. I have trouble with bright repps in general, which may be a little self-loathing of me given my background.
Manton and DocHolliday are right that cav twill or gab are the best choices for tan wool trousers -- the drape differentiates them from chinos. I like tan-to-light brown flannels, too.
If we're talking about jacket/trouser pairings, what would you all go for with this?
I think in this picture, I was wearing chinos of roughly the same hue as CM's wool trouser. I've also worn the jacket with light-colored moleskins of about that tone. Should I stick to tan with it, or would it work with medium gray flannels?
Also, setting aside that I need to replace that shirt with a decent one in similar cloth, any feedback on the rest of the combination? Tie is madder.