That would work - its the color they,ll end up being. You,ll save yourself some time.
My friend got in his car forgetting he had ketchup packets from a fast food restaurant in his back pocket. Of course they broke open when he sat down. The white leather wiped right off as clean as you please, but the stitching turned the most amazing shade of filth you could imagine. I never saw the drivers seat stitching clean after that.