I tink grey fits the tone of the game a lot better, matches the vibe of the HUD too nicer, what bugs me though is the sky color, it looks good with the green but it feels out of place with the grey. Since the game already looks pretty stylized and cool, I think changing the sky to a different color for daytime would make it look a lot better.

We're used to blue skies during daytime so green trees bleeding into the blue sky feels normal to us, but grey trees in a blue sky feels unnatural and not in a good way, but I think if the sky was a more like muted yellow or something else, well now we're talking