If you look long enough and hard enough, there's probably some green in the the throat of just about every daylily.
I think the fascination with green throats might have come about because in the early days of hybridizing, many daylilies had harsh yellow or gold throats which didn't really go all that well with the dominant color of the segments. Green tends to complement most colors, and human beings tend to associate the color green with concepts such as "clean", "cool", "refreshing", and "healthy". Well, at least plant health.
I grow a few daylilies without green throats which I really enjoy, but not that many. Frank Gladney is one, Serena Sunburst is another. There were also some older Munson daylilies such as Chinese Autumn which rocked an amber or creamy throat to good effect. Pastels can get away with it, reds, lavenders, pinks and reds, not so much.