I am about to tag the major colors found in the photos. Like classifying a photo into "red" and "blue" and "white" when there is a country flag. (This is just an example). I would need a minimal list of colors - that human eye can easily grasp them individually, but yet, it would be a great list to cover all possible ranges.

I do not need a full list of "red" color themes. But a minimal list only - that would say red.
In fact, I am searching something like a very small list of colors - like the Rich Text Editors provide.

Any link, or article or even the color list (with the color codes) would be good.

PS: Google Images too has begun searching images by major color themes in the image composition.