BANA is official Fan club name of the B1a4 Fandom.
On the 31st of July, Jinyoung made a post on B1A4’s fancafe announcing the fandom name, 'BANA’ (바나). BA represents B1A4 while NA represents the fans. When put together, it means 'we have fallen for each other’ (반하다). BANA is a shortened version.
Their fandom color is Pastel Apple Lime Green.