Ok i think i am understanding this a bit more, and it seems to me like it has a serious and real potential use, but not in it's current form.
It actually seems like a great idea for a new utility.
As I understand it, this could be very useful if you are trying to find images that have a certain color in them.
So let's say i want to find a photo that matches the color of my windows background, or of a specific color scheme on a web page im designing.
It would be nice to be able to start a utility, put in a color (or a set of colors), and have it SCAN AN ENTIRE DIRECTORY of images, looking for image files that have a LOT of the colors i have mentioned. Or maybe even provide it with a small swatch of another image (say 64x64 pixels), or a whole large image screenshot and try to match some/all of the dominant colors in a theme.
You would want it to come up with some numeric score based on how close the colors where (not insisting on exact matches), and how much of the close colors it found, and then list the top matching photos and let you quickly preview them.
Some advanced options would be to score not based on euclidean distance of RGB but taking into account saturation, etc. Looking for contiguous background regions of color, etc. There are some definitely interesting possibilities.
I can see wanting some ability to tweak the scoring parameters, etc.
This actually sounds like a really neat idea for a program that i might even try if you dont. Obviously a lot of work to make such a program.
Or does such an advanced program already exist?