Hi Gary,
I used the 'Scuff' product from Glipstone on the link below. At the time they were local to me and I was able to drop in a sample of my sandstone leather for colour matching. I notice now they also do a leather dye which will they will colour match. IIFC the scuff was in a kit with dye, tints and a sealer plus sponge applicator. I was well pleased and nigh on 5 years later my steering wheel looks as good as the day I did it.
Its worth a call to see whether they still do the kit.
Hope that's of some help.
Tony
https://www.liquidleather.co.uk/ (note code for 20% discount)