system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
How many colours does a rainbow have?


assistant
A rainbow typically comprises 7 colors - red, orange, yellow, green, blue, indigo and violet, which can be remembered using acronyms like "ROY G BIV" or simple sentences like "Richard Of York Gave Battle In Vain", where the starting letter of each word corresponds to the starting letter of the colors of the rainbow, in order.