You're most welcome, Leigh :!:
Here's what I mean about the sky, Leigh:
There are two classifications of colors; recessive colors and dominant colors. Blue is the most recessive color and colors towards the blue end of the spectrum tend to be recessive. Red, yellow and orange are among the most dominant colors and colors towards the "warm" end of the spectrum tend to be dominant. What do we mean by "recessive" and "dominant"? Well, a picutre is worth a thousand words :!: :wink:
In the top image, notice how the yellow diamond seems to come to the foreground and the blue seems to receed into the background. In the second image, the blue diamond seems to receed into the background and the yellow seems to be coming at you. The blue diamond almost looks like a hole in the yellow whereas the yellow diamond appears to be in front of the blue. But even though blue is a recessive color it can act like a dominant color relative to colors which are dark and kind of "muddy" looking or which have a lot of gray in them. That is what I see as happening with the skins in your image. Since the skins are on the planes, and the planes are the subjects of the image, you would want them to appear "front and center".
The use of color is usually the last thing that folks get around to learning when making images BUT the use of color is very potent and carries EMOTIONAL content which can have a strong impact on the viewer.
We tend to see more red sports cars than blue ones. Why? Because red stands out AND conveys excitement, which is what sports cars are all about. At the same time, we don't see red walls in a doctor's waiting room. We tend to see more recessive colors instead. Why? Well, the doctor isn't looking to excite his patients and fire them up. They are probably hyped up enough as it is because they have some problem for which they are seeing the doctor. The doctor wants them to calm down and to be less nervous. We can make use of the same color concepts when making images. :wink: