"Ay, este azul, este azul Es un verde también Resolana brillando en el pez Con un silbo enredado en la piel." Does "azul" in this case mean "sad" or "melancholy" (as we say in English: "I'm blue without you" or "I have the blues")? Therefore, could the phrase "Ay, este azul" mean "Oh, these blues"? I understand the individual words in the verse above (except for "resolana" which I could not find in the dictionary) but can't make sense of the intended meaning of the whole phrase. Would a native Spanish speaker please help? Thank you!