JRsbugs said:
Personally, I think it's a great idea to be specific about the perianth and cup colours, but to keep it to a basic colour or we get into too much detail for both perianth and cup, some cups are described as having three colours!
This is not a problem. What we do is have a "Perianth color" area with multiple choice checkboxes, listing out all the possible colors. You then check off all that apply.
So in this "GYO" example, you would check off green, yellow and orange.
Then when later a user does a search for all daffodils that contain green in their perianth, it finds all the daffodils that have green checked off. If someone else searching for daffs that have both yellow and orange in their perianth, they will be able to do so and find this particular cultivar.