Making clothes darker?

Question

There probably isn't a way but i still would like to know if there is.
I know that there are products you can use to keep clothes from fading, but is there a way to make a black shirt darker/more black?
the same question for other colors too.

Answer 1

Buy fabric dye in the same color. Dye the garment. Works especially well with black.

Answer 2

you can do fabric dying at home with stuff from the grocery store or you can take them to a specialty cleaners in your area, sme dye clothes, also lots of shoe repairs do clothes dying ( sounds weird, but true)