This picture is the result of a failure, actually.
I had intended this to be a nice HDR image, but it did not turn out that way. There was too much ghosting and too many ghost images. It is a composite of 7 images, with people moving while I was clicking. The little flag was waving.
As I looked at the image, I decided to desaturate it while processing the HDR to see how it would look, before saturating the image again. The desaturate look gave me some ideas, as the ghost of some colours remained.
In Photoshop, I applied curves, then masked some of the curves effect, did some more desaturation along the RGB channel, and introduced some colour back in the yellow channel.
Does it look ghostly, or has the explanation made it all seem very bland now?