pink background is a great variation as mentioned it's good to have both versions for different areas.
The issue is that pink version defies logic.
I cant edit so I'll try to explain.
Front trees fade to pink mid-ground suggesting sunset type ambience and atmosphere, but then the sky is just bright blue like normal.
seems like decisions need to be made either about the front trees or the sky so the atmospheric perspective makes sense.
also the rear-most tree should be have larger clusters with less colours to reduce the effect of "detail" on visual priority.
Colours of rear most trees also stand out a bit too much against blue sky.