(Save this step until you're ready to frost the cake.)
Optional: toast the coconut for the cake. Add the coconut to a small saucepan set over medium heat and occasionally stir until the coconut is toasted. Set aside.
Add the cream cheese, butter, and salt to a medium sized mixing bowl. Use a hand mixer or a stand mixer fitted with the paddle attachment to beat the ingredients together for 3-4 minutes, until the mixture is light and fluffy.
Slowly beat in the powdered sugar until all of it has been used.
Add in the vanilla bean paste and a little bit of blue food coloring. Mix until well combined, adding in more blue food coloring as desired.
Frost the cake: If the cakes are not flat on top, level off 2 of them. Place a small amount of frosting down on a cake platter, then place a leveled-off cake on top of it.
Top the layer with ~½ c. of frosting and spread it to the edges. Add on another leveled-off cake on top, then top it with another ½ c. of frosting. Add on the last cake layer.
If your frosting is super soft and the cake seems to be wobbly, stick the cake in the freezer for at least 10 minutes, or until it firms up, before frosting the top and sides.
Frost the top and sides of the cake, then coat around the bottom with some of the toasted coconut flakes.
Add a circle of toasted coconut flakes on top of the cake, then place some Robin Eggs candy in the center. Slice, serve, and enjoy!