Are there special meanings for the different colour of heart emojis? Like flowers for the Victorians? Because I send them pretty much at random & now I’m worried

If they are consistently coded in general use, I'm equally ignorant. I often select a colour that corresponds in some way with the object, e.g. the clothes or surroundings of a loved one in a photo. But red is my default and by far the most common one I use.

There are but I’ve seen various differing meanings so I like you use them at random.