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

In the aerial photo uploaded to X, there is a group of about eight people near the stage, to the centre, wearing purple shirts. As reported by the Star, and other media, there were hundreds of protesters concentrated by the main stage, compared to thousands of Ford Fest attendees sprawled across the park. Near the stage, protesters were among dozens of Ford supporters, including political staff and invited stakeholders. The aerial photo appears to show blue balloons, while a Star reporter observed only purple and pink balloons in the crowd by the main stage. vs.