Hi Lyn It depends on the context. But often 'blue' is used to mean sad or unhappy. Does this make sense with your example? Chris

As Chris says, "blue" often means sad or unhappy. For example "i'm feeling blue" or "I've got the blues" - means I'm feeling low, sad, unhappy. It could also be referring to a football team /supporter of a team that plays in blue (for example, in Liverpool there are two teams - Liverpool play in Red usually whereas Everton normally play in blue). Sounds more likely to be related to mood

1.你是否不高興或情緒不好? example: Tom asked Alvin about his mood and feeling. 2.你的(東西/物件) 是否藍色的? example: Tom asked Alvin about the colour of his toy car.