This is a fun picture to color. These cute chicks can be colored yellow as new born chicks are always of yellow color. A medium shade yellow can be used to color them. The beaks of the chicks can be colored a darker shade of yellow.
The egg shells can be colored a light brown, the shells can also be kept white but a light brown would look nice here.
In the egg shell which shoes the feet of the chick, the feet can be colored a red brown shade as that is the color of chick feet. Their nest can be colored a light brown to make it look like a real nest. The background can also be a shade of brown. You can draw a line border on the side of a pretty color as well.