Your summary seems good. Although for your Hadrons, its better to understand that, a Baryon contains 3 quarks and an Antibaryon contains 3 anti-quarks. The meson, however, contains a quark and an antiquark. Two quarks or two anti-quarks are never stable. This is due to Color Confinement.
A quark can contain a Red, Blue, or Green color. An antiquark can contain an Anti-red, Anti-blue, or Anti-green color. Any stable particle must be colorless, or white. You can make White with Red+Green+Blue (Baryons), Anti-Red+Anti-Green+Anti-Blue (Anti-Baryons), or Red+Anti-Red, Green+Anti-Green, or Blue+Anti-Blue (Mesons)