“蓝色的东西”是一个表示忠诚和忠贞的东西。

"Something blue" is an object that symbolises faithfulness and loyalty.

youdao

被主人公华莱士对祖国的忠诚而感动，被他对爱情的忠贞所折服，他的这份勇敢与执着感染着我。

I was deeply impressed by the Hero's loyalty, courage, and persistence to his motherland and his faithful love. Nothing is impossible to a willing heart. I appreciate it.

youdao

You may return with very different loyalties and allegiances than you had in the beginning.

可能变成具有非常不一样的忠诚,忠贞的程度更胜于开始时。

耶鲁公开课 - 政治哲学导论课程节选