Now, this answer has an asterisk attached to it (as all the best answers do). What is the rarest m&m’s color? Ms Brown An Ms Green Like To Celebrate National Friendship Day Mm Characters Character Miss Green It was never mass produced, it was used in a promotional contest back in the 90s. Rarest m&m color brown . Eventually, on the basis of 712 m&m's, he decided the color breakdown was now 19.5% green, 18.7% orange, 18.7 percent blue, 15.1 percent red, 14.5 percent yellow, and 13.5 percent brown, which would make steve's beloved brown m&ms the odd ones out. Brown was the rarest color, making up only 13% of the total. Golden brown #996515 60% 40% 8% 36 ° 76% 34% 86% 60% golden poppy: *the rarest color m&m is actually tan. Css color name hex code value rgb code value hsl code value; Now, this answer has an asterisk attached to it (as all the best answers do). Outside of a few exceptions, nearly everyone has eyes that are brown, blue, gre...