"Darker Than Blood" (working title: "Horizons") is a song written and recorded by American musician Steve Aoki, featuring the vocals of American rock band Linkin Park. It is the second collaboration between them, and is included on Aoki's third studio album, Neon Future II. The single was available for pre-order on Amazon.com. A half-minute promo of the song was made available by both Aoki and the band. The single debuted on Twitch.tv on April 13, 2015. It was released as the second single from Neon Future II on April 14, 2015.