Hair Swatches question

Hello! I'm not exactly a skilled CC creator, although I do know my way around S4S, but I'm having some trouble here. I'm trying to make a sim who wears "wigs" by giving them CC hair with non-default swatches so it won't force a consistent hair color. Unsurprisingly, I'm having some issues with it, but that's beside the point. I'm trying to make a duplicate set of base-game hairs with the regular set of swatches, but trick the game into thinking they don't correspond to the regular colors.

I'm not sure if that makes sense, but I thought it would be as simple as removing the Hair Color tags per swatch, and unfortunately, that didn't work and the hair colors are working as intended, i.e. choosing the fake-auburn in my duplicate hair switches all hairstyles with a corresponding swatch to auburn. Anyone know how I can get around this?