The first descriptions of Cub Caps were that they should be green, peaked with yellow piping. B-P described them as a cricket cap. Unlike the Scout 'wide awake' or lemon squeezer hat, caps were in common use when adopted in 1916.
Legendary cricketer signing an autograph
Cubs with caps, neckers, shorts and socks
The style and colour remained throughout. Hats were abolished for all
sections in 1989.