Melt candy melts in microwave: 30s, stir, then 15s until smooth. Tint small bowls with pink, purple, gold.
Dip each sugar cone halfway in a color, twist to swirl, set on parchment to harden (10–15 min).
Fit a toothpick into cone base, insert into cupcake center. Press gently so cone sits upright.
Pipe a swirl of buttercream around each cone base to hide the toothpick and smooth edges.
Arrange cupcakes on the 10-inch circle in concentric rings, largest on outside. Sprinkle decorations.
Chill 15 minutes to set buttercream before transport.