My latest rehab, 4050 light weight collection Shoulder bag in Burgundy.
it was very dry and faded, color didn’t come back from dunk and conditioning. In fact a dark spot appeared on the front flap after dunk. (Didn’t take photos of before / in process). I end up color fresh the whole bag with Feibing’s Burgundy leather dye(usually prefer pro dye, but already got the regular dye on hand). The color of bag now is several shades darker, but it hide the dark spot on the flap and other stain marks well, so I am ok with that. The thing with leather dye is hard to control the shade of final color, it will be very depend on how much dye used.
@lazysundays, I saw you speckled green court, it is possible to color fresh the whole bag with green leather dye, if you are generous with the amount of dye going to use, the green will be in darker shade, may be able to hide those darker spots. )Only if you out of other options, since things can go wrong with a dye job)