'Sombrou Dúvida' is a question. A play on words in Boogarins' native Brazilian Portuguese. It's a contraction of 'Sombra Ou Dúvida', the title track of the album, which translates as 'Shadow Or Doubt'. There might seem to be a darkness to the question, given that both choices aren't exactly cheery. Yet, Dino, the smiling, Afro-donned singer of the group tells us that "shadow" refers to a feeling related to your comfort zone, whereas doubt is the uncertainty that hits people and leads them to follow their instincts.