Bad Hair Day

I can't seem to understand why I continue to see older Japanese women with brightly colored hair. I know we have our fair share of blue hairs in the states, but on a regular basis I see old women here with blue hair - royal blue, green - kelly green and purple -very violet hair! Is it just a bad dye job? Why don't their friends tell them that their hair is green? There must be more to this story. So sorry that I don't have a picture to post for this one.