Most automotive leathers are so heavily coated these days that it probably didn't soak in. First step is always blot up any liquid (not in this case). Next step is a damp cloth and rub the area, if that doesnt work try with some mild soap and a damp cloth (Dawn dish washing liquid is my go to). If you want to try something stronger after that then do like you said in an inconspicuous spot first.

I agree with Steve's advice. I have never used naphta. I do not know how strong reacts to not alter the coat of transparent sealer/lacquer automotive (top finished) leathers have.
It would be advisable to do some tests beforehand on inconspicuous areas.
I have found some tips on internet:https://www.wikihow.com/Remove-Red-Wine-Stains-from-Leather

We do a lot of leather refinishing, a lot of newer leather does stain easily, dye transfer from leather belts, blue jeans, bronzing spray on tan, red dye from koolaid, all can soak into some leather. If a mild cleaner like Simple Green diluted or rubbing alcohol doesn’t get the stain out the only fix would be to spray a finish over it to cover the stain.
We do that type work on a daily basis.

Thanks for everyone's input. I really appreciate the opportunity to field these gnawing questions that come up from time to time. :smile: