Interrogative pronouns are used in asking questions. These words in English are also known as wh-words because they include the same two letters –Wh. Interrogative pronouns are: what, when, where, who, whom, which, whose, why and how.
'What's your favourite colour ?', 'What colour are your eyes?' or 'What colour is the car?' - these are the most common questions about colour in English. If you know the names of the colours in English, you will answer those questions . Here is the list of the most common colour :