Maybe the guys from Changing City may have pictures but if I recall the building that was there before the current Capital Building had a Dark wall so maybe he is referring to that dark wall. I know that spot was not the nicest to look at back then. I use to spend hours and hours on Seymour because of the rerouting of all the buses as part of the construction of the Vancouver City Centre Station and Canada Line.
Edit: I found this from "What was there before?" Link:
https://vancouverchange.wordpress.co...ol-residences/
So yes the wall was pretty dark before the current Capital Residence was built.