I remember playing some CGA games with some Hercules graphics card. There was two TSR programs which made it possible to run CGA color games with the yellow-on-black Hercules display.

Can't remember the name of the other one but one of them was definitively SIMCGA [https://www.pcorner.com/list/GRAPHUTI/SIMCGA41.ZIP/INFO/]

Without that awesome program my childhood would've been a lot less intresting.