I'm looking for a t-shirt manufacturer that specializes in custom colors. I know lingerie companies use different shades of (nude) brown. I'm looking for that same pallet to introduce a line of logo t-shirts.
Hanes makes Tshirts in a variety of colors, including a light tan(although I'm not sure if this is what you actually need). Depending on what your logo is, other colors might work just as well or even better in case you can't find exactly what you are looking for. Try looking in a local arts and crafts store to get a general idea, and/or go online to get a more accurate one. You can also order the shirts online in bulk to save money.