The castle was indeed already well-photographed. But surely you’re aware of the phenomenon that makes anything brightly-colored suddenly a magnet for social media posts? The “
museums” in San Francisco that are nothing more than rooms with
bright colors and
plastic props?
Bake shops? The
Purple Wall? The new
painted areas of Tomorrowland?
It’s all marketing in the age of social media. The
theory is that brightly-colored photos catch the attention of Instagram users as they scroll through their feeds. If you want people to notice your photos (and hit that like button!), you need to post attention-grabbing, brightly-colored photos.
Add to that the fact that many (most?) Instagram photos are edited with filters that can tone down the coveted bright colors, and you need to punch the color up to 11 in order to retain that same level of pop. The white and blue castle was beautiful and photographed, but it wasn’t attention-grabbing like the pink/salmon and blue/purple. Or something.
(Note: I don’t actually
agree with all of this, but it is a popular approach to marketing that someone at Disney seems to have embraced to some degree.)