The LEGO ninja figure is a sight to behold. The ninja is masked and clothed with a black cloak, with two swords attached to their body. They stand atop a single LEGO brick in a sign of power and mystery. For this coloring page, I'd suggest choosing darker colors to give off a more mysterious vibe. Shades of black and grey will create a striking contrast that will draw the eye in. Small hints of lighter colors like beige, grey and light blues will help to bring depth to the page, and will make the LEGO piece truly stand out. Finally, a bright shade of red or orange for the swords will make them even more impressive.