I have no idea if this would work for you or how you would feel about it: I dyed 3 pairs of my blue jeans black(don't know why but almost IMPOSSIBLE to find black jeans here in my size). I dyed them the deepest black I could find and no one at my job has ever caught on that I'm not wearing black slacks. For shirts I usually go for a polo because they pretty much fit like a tshirt and are the same material. I'm comfy and still in dress code for my job.