This coloring page features four ninja turtles ready for a fight. The turtles are sporting their traditional green shells, long claws and masks. In their hands they wield swords ready to take on any enemy. Consider using a pallet of greens and browns to color the turtles, ranging from light to dark greens to denote a sense of depth. For their masks, try using the color black and a combination of other darkness hues to give them a sinister look. As for the swords, silver, white and blacks would be great to use. Adding a bit of yellow to the blades could add an extra shine to them. As a finishing touch, adding spots of bright colors on the shells and using a thin, silver outline to the masks will really bring the coloring page to life.