Welcome to the Helpful Gardener. No question is ever stupid when it comes to gardening, so not to worry.
Your question is a good one, especially with the different colors seen today. The colored part of the plant is actually a bract and not the flower. The flower is in the middle of the colored bracts, which are a type of leaf. The new colors like blue are dyed. There is no blue in this species. You might find this Washington Post article interesting.
Here's how to get your poinsettia to bloom again.