It is + 颜色 — 英语阅读题

阅读短文，回答问题。 It is our Art Day (美术日). Look at my desk. My bag is on the desk. It is green. My ruler is in the bag. It is yellow. My pencil case is under the bag. It is blue. My rubber is in the pencil case. It is not white. It is pink. I love my colourful desk! Question: What colour is the pencil case? Use "It is ..." to answer. (用 It is ... 回答)