Tan Armrest Dilemma

SEM Products and others offer a clean and prep solvent for use with dyes. It's some sort of denatured alcohol or something, not sure but I found the plastic pipe clean and prep to be the same stuff and comes with a applicater brush to boot.
A custom mix color wont be cheap. There may be a generic off the shelf color that is close enough. Best plan is dye all 4 regardless. Good luck