This is Linda. Here's a tutorial with the ingredients and steps that you need to dye leather. I hope this helps you. Wishing you the best.
You can dye leather with leather dye. If the leather has been previously dyed, you will need to degloss it first. You can go a darker color but not lighter. I ordered leather dye and deglosser online. When finished, cover the leather with leather conditioner. I used Fiebings dye. There are YouTube videos showing using their dye.
Thank you! Will give it a try
I got my leather dye kit fairly cheap on ebay. It was really easy to use