The rainbow checkmark was one of the rebranding initiatives after the assimilation by Commodore. It was a nod to the five colour rainbow stripes next to the com

The rainbow checkmark was one of the rebranding initiatives after the assimilation by Commodore. It was a nod to the five colour rainbow stripes next to the company logo on the C64/Vic 20 case and on all peripherals, monitors and drives included. The logo on the C64 packaging also was a full rainbow gradient, but in the case of the Amiga it was a reminder of the 4096 colour palette.