This combination works phenomenally well :)

While I believe there is research out there, I’m not sure if it specific to signage.

I think you have to take into consideration what kind of material(s) the signage will be, location and lighting (indoor vs. outdoor), will it be paired with additional elements (a poster placed in a plexi sleeve—glare)

David

I think you need to know the source of the idea that white on dark gray is easier to read than black on white. It may be related to text displayed on a display monitor.
There’s a difference between black on white on CRT, on LCD, and in print. Often white backg