"Who U Are" combines 808 bass drums, Latin guitar, flute, synthesizer, and vocal effects and talks about awakening inner emotions unknown to even oneself.

In addition, as part of the Color EP trilogy, the hex code for magenta (as well as fuchsia; #FF00FF) is on the top left corner.

[13][14][15] He also appeared on the August 7 episode of You Hee-yeol's Sketchbook and performed "Who U Are", "Interview", as well as a brief cover of Johan Kim's hit song "I Want to Fall in Love".

[18] Magenta surpassed 320,000 physical album sales within a week[19] and resulted in a Hanteo Chart official certificate.

[21][22] The music video for the lead single "Who U Are" surpassed 10 million views within four days of its release, setting a personal record for Kang.