Here I’m just trying to spruce-up the bolsters of the passenger seat to remove cracking/creases & discolouration where someone has previously tried recolouring the seat.
This 250ml bottle of “self seal colourant” only costs £15 and seems to be a very close colour match for my seats. I used perhaps 1/4 of the bottle doing this job & will do the drivers seat this weekend (hopefully).

https://www.furnitureclinic.co.uk
Colour used: Sand (CR10)