BTS Blue & Grey is a song from the BE album.
BTS Blue & Grey Lyrics & Translations
I was feeling anxious when COVID-19 started to get serious because I didn’t know when I’d be able to see ARMY again. I settled on a scheme of “Blue & Grey,” using blue from the English expression “I feel blue,” meaning depressed, and the feeling that all the color had drained from my vision and I was only seeing in monochrome. I think the song reflects my style and works to deal with the psychological pain I was feeling.BTS V – Kim Taehyung (weverse magazine)
BTS (방탄소년단) ‘Blue & Grey’ @ MTV Unplugged