Where and why can the colour orange be found in nature?

I would say it can be found of the leaves of certain trees during autumn/fall. During autumn, the chloropyll breaks down in the trees leave giving them a yellow or orangish look. This answer may be too complicated, but that is what i would say.

Hi there!

The color orange can be found in maple leaves in autumn. The orange pigment in maple leaves come from chlorophyll in the leaves breaking down. 

Hope this helps!