Seat Doctor. They'll sell you the exact color to make the repair. Works great, I've used it on both of our cars with great success.https://www.seatdoctors.com/diy-leather-dye/
If that fails, try someone who does shoe repair. They're often set up to dye women's shoes for things like weddings. Or check out Tandy.com for leather dyes. Stay away from the new "eco" dyes. Water based dyes just don't work like the older ones.
Keep in mind that leather dyes have color in suspension. Once it dries, there will be color solids left on the surface that have to be rubbed off, or they will end up on someone's clothing.