Tiemblo como un flan is a fun and very visual simile that literally means "I tremble like a flan". Flan is a jiggly, caramel-topped custard dessert popular in Spanish-speaking countries.
In this song, Camilo uses this phrase to express his overwhelming excitement and nervousness at the thought of his loved one arriving. It’s a sweet and quirky way to describe the physical sensation of being so in love that you literally tremble with anticipation.
Índigo is a joyful love letter to the couple’s unborn baby, celebrating the magical moment when a dream finally takes shape in real life. Camilo sings about imagining this tiny person long before meeting them, and when the wish is granted, everything suddenly “huele y sabe mejor” (smells and tastes better). The lyrics paint parenthood as the ultimate jackpot—he feels like he’s “ganado sin jugar la lotería” (won without playing the lottery) and that Christmas has arrived early.
Throughout the song, playful images—shaking like flan from excitement, buying sunglasses because the future looks so bright—mix with heartfelt gratitude. The nine–month wait may be long, but it proves that “good things take time.” In short, “Índigo” is a festive anthem of anticipation, gratitude and unconditional love for the new life that will soon join their family.