Listen to Denim blue online. Denim blue is a Czech language song and is sung by Petr Hapka, Michal Horacek and Hana Hegerova. Denim blue, from the album Benefice cernych koni - Best Of 1987-2010, was released in the year 2014. The duration of the song is 4:02. Download Czech songs online from JioSaavn.