Answer:
Broken crayons still color because the color pigmentation is still in place. The crayon has something called pigmentation powder. The pigmentation powder is what adds the color to the crayon, therefore allowing the crayon to have color. As long as the pigmentation is still there, the crayon will still be able to color. If the crayon loses its color pigmentation it will lose its ability to produce color on a page. According to "How Crayons Are Made" they explicitly state,"The pigments typically come in a powdered form, with the specific colors and amounts determined by the final color of the crayon being produced." In short the pigmentation powder that is infused in the crayon is what makes the crayon color. The crayon's coloring ability is dependent on the pigmentation. The pigmentation is what gives the crayon its color. If you see a colorless crayon, you know it wont color. Despite the fact that the crayon is broken, if the pigmentation is still there, the crayon will still be able to work.
Step-by-step explanation:
Hope this is enough.