Yep I was talking to my daughter-in-law about the difficulties of photographing these wide open landscapes and spaces (she's very creative) and she said 'think about the colours' and with that in mind this was my first shoot using that idea.
For me it was as you say about the whole thing. The contrast between the blue sky and the green field in the first photo and then the green of the field with the washed our tiny section of sky.

The last shot should be titled. Where did you want this? ;-)