what is the speed of dark?

75-85 mph

Zero, dark ran out of gas and is parked for an eternal night.

A more important question is this. What is the speed of dark chocolate?

i don't think dark exists as a physical phenomenon. it's more like dark is the absence of light, but light is just part of the electromagnetic spectrum. there are no amplitude or longitude waves for dark.

You display the half vast understandings of a lot of subjects, this being another.
This was a joke by Steven Wright similar to the one that went.
"If Your travelling at the speed of light and you turn on your headlights, does anything happen?"

Unless it’s raining or there are icy conditions