With 16.7 million colors for billions of users, and the birthday paradox, there are going to be collisions in the space of web colors.

You're right! Here we see a case of colliding layouts, colliding image primary colours in those layouts, colliding header image orientations and placement, colliding header hero placements and colliding header hero font colours.

The footers and list styles seem to have had a minor fender bender too.

Quite the birthday these two sites have.