Resisted royal poinciana for a long time. It's wild range is just so limited. But if you're talking color, what better example. How do we talk color? There's more to it than yellow, orange, or red. Brightness counts. Low light is less colorful. Then there's chroma. Had to look that one up, and that's a really good thing to do. Chroma measures purity of color. Any artist would know that. Mix in a little gray, black, brown, or even white, and you don't have as clear a color. Turns out nature knows that too. Push chroma to the max, and pretty soon your flowers are growing all over the world!
In this wider shot you can see some older flowers turning more red.