What's the color of wires that go to starter?

There are generally 2 electrical posts to a starter.
One post is the large one the positive battery terminal goes to, and that is used as a junction for the alternator, main fuse block input, etc. It usually has a .5" nut and washer.
The other wire to the starter is small and usually a push on jack terminal. You can tell this one because it will normally be cold to a test light until you try to crank the engine.
Color is not necessary and could differ due to repairs.