RetroArch - one for many

Hi folks - just popping in here to ask for some advice since I’m not really well versed with all things available via RetroArch:

With a busted PC Engine Duo-R I’m thinking about emulating the games I want to play on it in the meantime, but I’m worried about how RGB output of PC Engine games tends to mess with the colour output of many games: Games that look better with Composite vs RGB colors | The PC Engine Software Bible Forum

Basically, I want the games to output as if I were playing them via composite/YUV, is this possible? I think Kaze no Densetsu Xanadu will look pretty bad via RGB colours, looking at the composite photos in the manual, really want to avoid that!


Edit: Solution! Improper colors | The PC Engine Software Bible Forum

Question now is whether the PC Engine Mini handled this correctly - Dungeon Explorer is looking awfully oversaturated here vs composite output on the actual system: https://youtu.be/hLCZmB9Qfug?t=368