With the black color, the relay blends in well, which can make the whole panel look more cohesive.
90650 Heavy Duty 12-Volt LED Flasher, 2 Terminals, 2-Pin LED Flasher, 12V, 20Amp
A nice touch is the black housing, which gives the relay a simple, classic look on the panel.
These general purpose relays show up a simple black unit, which keeps the overall appearance tidy and consistent.
Since I needed the SRD-12VDC-SL-C, I was glad to see it in the title.
A nice touch is the SRD-12VDC-SL-C marking, which makes identifying it quick and easy.
A nice touch is the small inset showing model 1-1618002-8 beside the wiring diagram on the packaging.