Some people say that on behalf of blue depression, this may be because the sea is blue, the sea is deep.

有人说蓝色代表忧郁，这也许是对的，因为海是蓝色的，海是深沉的。

youdao

Blue: coolness, spirituality, freedom, patience, loyalty, peace, trustworthiness; can also imply sadness, depression.

蓝色：冷静、性、由、心、诚、平、任；同样也暗示着悲伤、丧。

youdao

Blue: coolness, spirituality, freedom, patience, loyalty, peace, trustworthiness; can also imply sadness, depression.

蓝色：冷静、性、由、心、诚、平、任；同样也暗示着悲伤、丧。

youdao