Blue Hour's 'Boulder' came out on July 28, 2023. With this song being around four minutes long, at 3:36, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. The song is number 5 out of 5 in Aimless Nights by Blue Hour. Boulder is not that popular right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

Boulder テンポ

The tempo marking of Boulder by Blue Hour is Andante (at a walking pace), since this song has a tempo of 81 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

Boulder キー

F♯ Major is the music key of this track. This also means that this song has a camelot key of 2B. So, the perfect camelot match for 2B would be either 2B or 3A. While, 3B can give you a low energy boost. For moderate energy boost, you would use 11B and a high energy boost can either be 4B or 9B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 2A or 1B will give you a low energy drop, 5B would be a moderate one, and 12B or 7B would be a high energy drop. Lastly, 11A allows you to change the mood.