The grey you speak of was most popularized through Porsche's GT2/GT3 and Turbo lines on the 911 and Cayenne in the early 2010s. It was very eye-catching and McLaren quickly followed, and almost too close to tell who was first. Often called a "Ceramic Grey," other makes hopped in, and Kia introduced their rendition on the Stinger GT with great success. Mazda followed suit with the MX-5, then other manufacturers began trickling in their own versions on choice (and sometimes questionable) models. Late to the game, Chevy is the most recent adopter of a "Ceramic Grey," on the C8 Corvette, but did quite a spectacular job with it, leaning closer to a white while still staying true to a grey that is "just a little different."
An alternative to flashy metallics and boring silvers or darker greys, the non-metallic and non-pearlescent shades make use of minimizing luminance and reflectivity to bolster contrast in the edges and creases of modern vehicles where shadows are present without using a matte finish. Often they appear blueish or eggshell in the right lighting conditions.
The greens and tans mentioned above have been in and out of style, but the launch of the JL Wrangler in late 2017 re-popularized these shades with massive appeal. Toyota has been embracing them the most between their Tundra, Taco, and 4Runner. They are highly desirable still and look great.