The black color is a nice touch because it helps the relay blend into dark enclosures and backplanes.
Pack-2 LED Flasher Relay, 12V Speed Adjustable Hazard Warn Flash Relay, Replacem
What stands out about the black finish is that it tends to look less flashy while still feeling solid.
A nice touch is the labeled terminals on the relay base w/ relay for straightforward connections.
This one acts as a Phase Sequence Relay, and you’ll notice it helps keep your installation safer.