I have just barely seeing the series...
What does grading with a limited green palette
But the very first scene of the series is... Green-ish!
I also see some kids wearing green. Comparing the proportion of green items on my own home I do not feel the proportion is that diferent.
Let us just concentrate on the color grading.
Color grading in images, and specially cinema is a tool to evoke a mood, a feeling, an ambient.
Contrary to we might think we do not have thaaaat much variety of color gradings. A grading is a tendency to a region of a chromathic circle.
In my opinion we have 3 main regions, Warm colors (yellow to red), Cold (cyan to blue) Green (lime to turquise) and a secondary less used purple region.
So, what some grading can represent? The first two, are easy. Temperature. Depending on the context this warm or hot temperature, and a good one or a bad one (A Mad Max desert or a Baywatch beach)
Ok, the green one... In Matrix it is very clear that the green grading is when the action is taking place inside the matrix.
But in real life, green "ambient" is asociated with health institutions, hospitals, but more specific with old mental institutions. The color theory on the victorian era was that green was a calm color, evoking grass and nature. But a dark green gradient now is a iconic color of people lock down and crazy.
But what about a non saturated color?
The grading is also about non saturated colors. You do not want to see a happy mood here, but a psychological troubled ambient. The choice is obvious. Lower saturation, lower brightness.
I also feel that the grading is not just to green, but also to blue. Cold+Night=Mystery.
And about the sets and props?
The basic idea still remains. Green = Nature... at least in planet Earth. If the series is not about Nature, but super-natural... you want to step off the most obvious color in nature: green.
But I do not see that proportion too diferent.
How many green shirts (besides a very specific institutional shirt, like a University shirt) do you have?
What I feel lacking of is again, saturated props.
This is just my opinion.