When sewing 2 different coloured fabric, what colour cotton should i use?

Question

im sewing a few different fabrics, different shades and prints in brown and i need to know if to use dark brown, medium brown or light brown coloured cotton?

thanks

Answer 1

If you're looking for the least conspicuous, spread out your fabrics and overlap them shingle-style, with about 6" of exposure.  Lay a length of the candidate thread colors across all of the fabrics, and stand back a few feet to choose.

Answer 2

Something that matches.

Answer 3

Well, you could either pick a color that doesn't show up much in the fabric, almost like a contrasting stitch.  Or, you could also pick whatever color is shown most in your print as your thread color.