Color and Pop can occur naturally, be man made and or digitally enhanced by the photographer.
Nature can create pop using a Tree over several seasons, with a single Wildflower or a single Leaf.
A person can paint a door green and red for contrast against a white facade.
The background can be darkened with light placement to make an object radiant as if lit from within.
Or we can remove all but one color in a photograph to create a dramatic focal point.
The art of pop with color is limitless. Subject, lens filters, lighting, aperture adjustments, focal points, software enhancements etc. are all part of a photographers toolbox. Do not be afraid to experiment and make each photo a unique artistic foil for your creative mind. There is no right or wrong.