It is frustrating when I would like to find a suitable photo in my archive and can't because I didn't do adequate tagging when I added my photos. There are some 15,000 images there and all are labeled and tagged but just not as complete as I would like. Searching "red" was disappointing. I know have way more than came up. It's just that I don't tag thoroughly enough. When working with a new photo I assign the tag, the topic, that led me to taking the picture. It seems that I just don't step back far enough to assign tags for many more purposes. Like noting the predominant colors.
Nevertheless, my search on red came up with a small, but nice selection, including this rose.