"Welcome to Rainbow" comprises four tracks, which were re-released on subsequent Basshunter studio albums.

Basshunter wrote the lyrics and music; Fredrik Jansson mastered the songs.

[2] Basshunter initially published his song "Boten Anna" online in March 2006.

[4] With this success, Basshunter received several proposals from music labels.

[10] New versions of "Welcome to Rainbow" and its hardstyle remix (renamed "Hardstyle Drops"), alongside the single version of "Boten Anna" appear on his fourth studio album Now You're Gone – The Album (2008).