FC Barcelona used to play with white numbers back in the 70s. However, for the past 20 years Barca has mainly played with a yellow name and number set. For the season 21/22 though it is back to the good old days of the 70s with white numbers for the blau/grana kit.
The name and number kit is from Avery Dennison , while the jersey is from Nike.
The numbers are white for the home jersey for matches in La Liga as well as for matches in Copa del Rey.