The edit looks like it only touched certain colors.

The purple 'worth fighting for' shirts have a specific design and in the overhead shot many of the blue shirts look like they have the 'worth fighting for' design

Also, here a man with a very unique red beard is wearing a purple shirt.

Here is the same big red beard with the same people around. The shirt has changed to blue with the 'worth fighting for' design.

EDIT. Oh and in the first picture look at the person to the right of the red beard with the black and white striped shirt, the purse across their chest, and sun glasses. In the overhead shot their shirt changes to light blue