I guess I should look at this board more often. I'll echo B1B; if there's something you like, ask the artist. Most are reachable here, on FB, and sometimes their own sites. For my own stuff, there's a huge range. A little GW and Army Painter, a lot of P3, some Vallejo and Reaper, and if the colour is right or the paint job is older, some craft paint too (I preferred Delta, though more recent bottles don't stand up as well). To top it off, I've also got washes by Secret Weapon, and a full set of inks that IWM offered a number of years ago.
Techniques used will also have a big impact on the finished product. A nicely faded layer will look quite different from one that isn't blended at all, and may be hard to distinguish from two colours blended while wet. A light glaze can alter the hue, and even the photo editing and monitor settings can put things off from how they look in person. These differences obviously won't show up in a list of paints. I know that's not the most desirable answer, but it's the reality we have to work with.
