If you have an aniline style leather the wine will have soaked into the leather and there is nothing that will bring it out.

If you have a pigmented leather (one with a coated surface) the wine will have slightly redyed the finish. You can try LTT Maxi Cleaner as this is the only cleaner on the market which was specifically formulated for this problem. If this will not bring it out then you will need to contact a qualified leather technician who wiil be able to use solvents or recolour the leather whichever is needed.

Using a good Leather Protector on a light coloured leather (whatever the type) is crucial as this will inhibit dye transfer and also help prevent dirt and body oils from penetrating the leather. Do not use a leather conditioner as these do not work in this way.

The only problem will be that all the other things you have tried will probably have damaged the leather and will stop the proper products from working, but they are still worth a try.

Source(s):

Leather care consultants to the furniture and cleaning industries

I had a similar problem though and the only thing that worked for me was using a bleach pen. However, the surface area was extremely small. If you have a larger area that you need to fix then I’d suggest going to a store that sells only leather products and see if they could suggest something.

But then again, the stain I had was from a pen which was much harder to get out. Which is why I suggested using the other two first. Dye may be simpler to get out than ink pen. But I’m really not sure.

good luck!

magic erasers are about two bucks for a package of two.
they work wonders!

if that doesn’t work; i heard goo gone works. but i’d try the magic eraser first.