User blog comment:MaverickGuy720/Why Lincoln has White hair./@comment-32755913-20171225172622

People need to understand that the characters are drawn without color, only after they draw the colors. What must have happened is that only the coloring hair was missing, the designer thought: "I have no creativity to choose the color of the hair. But looking like that, until the hair looks nice this way, I'll leave it that way." Because of fate, this kind of thing has never been repeated with other characters, perhaps because they are based on more realistic traits, so it probably will not happen until we have characters with a more cartoonish style.