@samfalstaff I personally would not ....based on this from the RM subforum:
quote: I knew it ould darken it, but it looks blackened rather than just darker. I'm sure it'll look a bit better when dried, but I'm not that hopeful. I should have tested it on a small spot, but I've used SO many conditioners over the years that I wasn't particularly worried. I always said I should buy a back up of this bag, so it might be time.
unquote
if you go to RM and do search for leather honey you will see the conversation. this woman used it on a light brown bag and feared it was ruined