In a medium saucepan, stir together the rosé and sugar and sprinkle the gelatine overtop; let stand for a few minutes to soften. Set over medium high heat and bring to a simmer, stirring until the sugar and gelatine are dissolved. Stir in a drop of food colouring if it’s not quite pink enough.
Pour into a loaf pan (or small silicone candy moulds, if you have them) and refrigerate until firm. Cut into small 1/2-inch cubes and roll in a shallow dish of sugar to coat. Makes about 60 gummies.