There are many kinds of greens that exist, and it is one of the most broad basic color categories in the rainbow. There are many warmer/yellower greens and many cooler/bluer greens. There are lighter greens and darker greens, more vibrant greens, and duller greens.
Some people consider green a cool color but really, it's so broad that it depends on the green in question. Many neutral greens in the industry tend to be cooler than RGB Green. And in fact, this color caetgory is broad enough to explain why some color systems like Munsell, ISCC-NBS, Ostwald, etc. consider warm greens and cool greens to be separate color groups.
RGB Green does tend to be a warmer green. And it's lighter and more saturated than many greens. But many greens aren't this saturated.
General Rules
- Ironically, you should never have the green channel at 100%/255 unless you intend to make a pale green or white.
- Many neutral greens actually have some RGB Blue in them like the example you are seeing right now. RGB Green is yellow-leaning.
Examples coming soon!
Lime
This color is still considered a green but is more yellowish. On the Munsell color wheel it is considered its own color (yellow-green). I admit I put this in its own section because several other color models do the same thing, and mostly named it lime becuse of the W3C color and to mirror the orange color (which is considered yellow-red by Munsell). The red channel is greater than the blue channel here, and in darker shades you can get away with a blue channel of 0!
Examples coming soon!
Turquoise/Teal
Well, erm... It's between green and blue so it's debatable? I'll put this under green since I have cyan under blue. Teal is darker, turquoise is lighter. Like with pink, which is more agreed on as a basic color term, the distinction can actually get ambiguous.