The colors of the mermaids and the lagoon can be modified to fit any artist's vision. For the mermaids, colors such as pastel blues and pinks can be used to emphasize their femininity and ethereal beauty. For the lagoon, muted greens and blues can be used to represent the peacefulness of the environment. Fish can be colored in vibrant shades of orange and yellow to illustrate their movement through the water. To create highlights, silvers and bright whites can be used to add texture and dimension to the picture. Additionally, touches oflavender and light yellow can be used to add a whimsical and peaceful element to the coloring page. With all these colors in place, the three mermaids will be singing and playing their instruments, perched atop the rocks in the serene lagoon.