Restoring a pair of riding pants

I just dyed my old (first) pair of BMW City riding pants and now they look almost as good as when I first purchased them. Originally a charcoal colour they faded to a pale grey which did not look good but otherwise they still were in excellent condition. I purchased some charcoal fabric dye from eBay cheap and 30 minutes of soaking in hot water with the dye gave me an excellent result. The photo