Preheat oven to 225°F and line 2 baking sheets with parchment paper.
Place the egg whites in the bowl of an electric mixer fitted with the whisk attachment. Sprinkle cream of tartar and salt over the egg whites and whip until soft peaks form.
Add the sugar slowly, about ¼ cup at a time. Continue adding and whipping until all sugar has been added and the mixture is glossy and stiff peaks form.
Add the cherry juice and food coloring (if desired) and whip until fully combined.
Remove the bowl from the mixer and spoon the mixture into a piping bag fitted with a star tip.
Pipe your desired shape onto the prepared baking sheets.
Bake for 60 minutes. Turn oven off and leave meringues inside the oven until fully dried out, about another hour.