Pour 1 cup of the mixture into each pan. Using food coloring, add enough to achieve the desired color. For the pastel pink, I used 2 drops of neon pink food coloring. For the lavender, use 2 drops of neon purple food coloring. For the blue, use 2 drops neon blue food coloring. For the yellow, use regular yellow food coloring (about 6 drops). Stir to thoroughly dye each pan. Refrigerate for at least 4 hours or overnight.