There's a certain, profound blue in her poetry that resonates with many.

blue 的本义是"蓝色"，但在文学作品中常用来象征"忧郁"或"悲伤"的情绪。这种用法源于西方文化中蓝色与忧郁的关联，就像我们说"感到忧郁"时会用"feeling blue"来表达。