Optimizing Color Combinations

For this image I used three separate images one was of a vw bug, and the other was of a field of flowers, and an airplane trailing a sign. I adjusted the colors and used filters and adjustments to achieve the final image. The color scheme just came into play because the original colors contrasted well with each other and worked really well. I messed with the filters to get the sky and the car with the plastic wrap effect. I also used the text tool to write my name on the planes banner. Other then that I used hue and saturation. levels and curves. I saved different paths then selectively adjusted them to get the end result.