Man pages matching name showrgb in section 1:

showrgb.1.en	debian 10 / x11-xserver-utils
showrgb.1.fr	debian 11 / manpages-fr
showrgb.1.en	debian 11 / x11-xserver-utils
showrgb.1.da	debian 12 / manpages-da
showrgb.1.de	debian 12 / manpages-de
showrgb.1.fr	debian 12 / manpages-fr
showrgb.1.en	debian 12 / x11-xserver-utils