As of the writing, there is no official statement from Facebook regarding the reason for changing the icon to black and blue. However, it may be related to the upcoming full release of iOS 18 on ...

You can remove the chevron (>>) blue box icon overlay on files in Windows 111/10. This post explains what this icon overlay is & how to remove it.

AN iPhone fan was left confused after spotting a strange blue icon at the top of the screen. The symbol appears next to the clock in the top-left corner of the status bar. They shared a photo of th… ...

Such is the case right now with people who have noticed a blue Gmail icon instead of the typical red — an update that apparently happened sometime around January 26, according to HelloGiggles.