The Oranges belong to the same series of pictures as the Reds&Greens;: all pictures of food. The Reds&Greens; consist of pictures of paprikas (Reds) and cucumbers (Greens). The Oranges offer more variety: carrots, melons, potatoes, and pumpkins.
Imagine viewing ultra-large photographic prints mounted on walls in an enormous space. Think modern art. Think big.
Think of monochromatic paintings by well known painters.
With the Reds, Greens, and Oranges, it’s your guess.
That is all I can tell you.
Green- Orange- Red: think traffic lights.
Green: go
Orange: use discretion
Red: stop