Comment by Dewani90 on Nengan no Akuyaku Reijou - Chapter 56

@Dewani90  
Well ... technically darkness is faster than light. 

Since it forms from either an absence of light, or an obstruction to light.  Darkness is so fast that it forms before light can travel to it's location and buy a time share on it's turf.

@Ashanna Hensley (Ren) No, darkness speed is the same as the light speed. like you said darkness is the absence of light, so the darkness or shadows only manifest after the fotons. if you cut a stream of fotons, the "darkness" will go after the last foton and will only get there at the same speed of light.