So I have two 7800 systems - one is PAL and the other is SECAM. My PAL 7800 does not have a composite/S-Video mod yet so I could only run it through RF. The SECAM system has a factory RGB output (which AFAIK is internally converted from composite). Unfortunately my RetroTink 2x Mini does not accept RF or RGB outputs so I could only take pictures of the screen (an old 15" LCD TV) with my phone. In the end, there are too many factors that may impact the colours. Anyway, here are the images, first the PAL machine, second SECAM.(I only used Pole Position II as in the other games it was hard to spot the differences. I did not do any adjustments to the photos other than perspective correction.)