Color flow in an orchid exhibit means that you shouldn’t put an orange in a group of lavenders. The colors should F~L~O~W~ from one to another gracefully like the rainbow.
By sticking to this rule you can avoid any bone-jarring clashes that might disturb judges and the public at large. Color flow will guarantee that a sense of serene well being will envelop all who view your exhibit. But most of all, color flow makes sense and provides a useful guideline for placing orchids in an orchid exhibit.