I'm not sure I would rely too much on MobyGames' screenshots,
I *have* seen the composite color mode on my TV, and I've found that the screenshots are reasonably accurate. I could also say that my colors are right because that's the way my TV looks, but I don't think that I would be making a strong case that way. 😀
especially as some seem to be taken using a card other than a true IBM Color Graphics Adapter.
But that wouldn't change the colors. First of all, I think most 'clones' still used the 6845 video controller, second, the composite color mode, at least as far as the graphics card is concerned, is just a monochrome mode with the color burst signal turned on, so there's not a big gamut as to what a card can do differently.
In the 50 year history of the NTSC standard, you would have to be viewing TVs of this vintage to get the pure effect:
Well, I don't think any programmer of 80s software used a CT-100. As for the 'pure' effect, studio-grade equipment basically fulfills the NTSC spec completely except for the phosphor primaries, which are the brighter (but less colorful) SMPTE-C primaries instead, which in turn are almost exactly the same as sRGB, the standard for properly calibrated computer monitors (which doesn't mean that all computer monitors actually look that way 😉)