 above the average DIYers, but what I've done is I've found areas in the concrete that weren't that visible, like on the side or the bottom of the step or slightly below grade, and I've used a drill, a hammer drill, which is a masonry drill, and drilled out some test holes and collected the chips because that dust is the same color as the rest of the concrete, and then I sprinkle that over the caulk and tap it down with my fingers, and it blends in perfectly with the surrounding surface.