Oh, not that stupid, huh?
Query: The 2nd colour in purple, belly, yellow, arm, white and blue
Answer: yellow
Query: The 3rd colour in purple, belly, yellow, arm, white and blue
Answer: yellow
Query: The 7th colour in purple, belly, yellow, arm, white and blue
Answer: yellow
Query: The bluest colour in purple, belly, yellow, arm, white and blue
Answer: yellow
:-)