The song additionally serves as the album's fifth and final single, being released on 21 April 2020.

[2] The song was compared to the works of Ed Sheeran[3] and Horan's former band One Direction.

[2][4] Lyrically, it is "a soaring declaration of eternal devotion" with visions of a wedding day and golden hour.

[5] In terms of music notation, "Black and White" was composed using 44 common time in the key of D major, with a tempo of 148 beats per minute.

[7] Horan also performed the song on 18 April 2020 on the Lady Gaga-curated One World: Together At Home television special, a benefit event by Global Citizen to raise funds for the World Health Organization's COVID-19 Solidarity Response Fund.