Good Morning Ghislaine,
I don't quite understand what it is you are colouring. Plant pots? Or do you mean growing varieties that share a similar colour in each category?
I have heard of someone planting their plants in what they had called a "Grocery Aisle pattern" for harvest dates. – Fruit that is ready to harvest at similar times
should be planted in “aisles” to make harvesting organized.
I just found where I heard the idea originally!
Miracle Farms
I'm sorry that my
answer might not address what your question is asking, but I thought I'd give it a shot.
Good luck to you,
Amjad