When working on a set of changes to a website and mobile app, there was a discussion about how one of the main actions should be presented to the user. It is a feature that allow users to "Like" a photo by clicking on a button with a hearth icon.
In my understanding (and others thought as well), in the default state ("not liked yet") the button's color should be black, and then turn red when liked by the user.
However, it was decided that it should be the exact opposite: default state (not liked) being red, and after the photo was liked by the user, the button would turn black.
Is there any specific reason for choosing this kind of color combination? (considering it was well thought and not just random).