Talk:Kurai Jack Jade/@comment-24087318-20131220111831/@comment-4773581-20131220163420

It also doesn't normally come in red, yet that's the color it's most often represented by.

Really, though, Red, Orange (the natural color of fire), and Yellow are the three most common colors for fire to be represented by in fiction and art, and are basically the "safe" colors for that element, meaning that nobody really questions their use all that much because they're acceptable representations. Similarly, lightning and electricity have their own "safe" colors: White (because it's the natural color of lightning, and a lot of the time in fiction lightning/electricity tends to be this with one of the other colors as an outline), Blue (mostly for man-made electricity), Yellow (no real preference in any direction), and Purple (probably the least used of the four).

IRL, though, Red, Orange, and even Green lightning aren't unheard of, though they're definitely pretty unusual and (assumably) rather rare sights. Black lightning, though, is just completely out of the question.