Color changes
The original 1941 colors of M&M candies were red, yellow, violet, green, and brown.[70] Violet was discontinued and replaced with tan in the late 1940s.
In 1976, Mars eliminated red-colored M&Ms[71] because of health concerns over the dye amaranth (FD&C Red #2) that was a suspected carcinogen and they introduced the orange variety. Despite the fact that M&Ms never had contained the dye, this action was taken by Mars purely to avoid any concerns by worried consumers.[13] Ten years later, a student at University of Tennessee, Paul Hethmon, started a joke campaign to reinstate red M&Ms that would eventually become a worldwide phenomenon.[72] The red M&Ms variety was reintroduced as a result and the orange variety that had replaced them were kept in production.
In Europe, the red M&Ms contains red dye carmine (E120, cochineal).[73]
Tan was replaced with blue in late 1995, following a promotion in which consumers were invited to vote on which of blue, pink, or purple would replace the tan M&Ms. Blue was the winning color with 54% of the votes.[74] Consumers could vote by calling 1-800-fun-color. Ads for the new blue colors featured a plain and an almond blue M&M character. Red and Yellow were depicted as trying to do takes in the commercial by painting themselves blue where they appear on stage with B. B. King singing the blues, but the filmmakers had to cut the scene as they were not using the correct shade of blue proposed. Another version of the commercial featured Red and Yellow holding their breath to resemble the new blue M&Ms where Steven Weber sees the three M&M characters, Red, Yellow, and Blue; and one more version featuring Weber asking the blue M&M whether or not it had dived into the chocolate pool.
In 2002, Mars solicited votes in their first ever "M&M's Global Color Vote" to add a new color from three choices: aqua (turquoise), pink, and purple. To help the colors get votes, Ken Schrader and his MB2 Motorsports team, who was sponsored by the company at the time, ran four paint schemes during the 2002 NASCAR Winston Cup Series season representing the promotion (one for aqua, one for pink, one for purple, and another one with all three colors on the car). Once purple won and was featured for a limited time, specially marked packages of the confection were released. Finding a bag of all purple M&Ms entitled American customers to a prize of 100 million Japanese yen (equivalent to approximately US$852,000), payable in U.S. dollars. Other cash prizes, numbering more than 50,000, came in euros, Australian dollars, Brazilian reais, Mexican pesos, and U.S. pennies.
Since 2004, M&Ms have been available online in 17 colors with personalized phrases on each candy on the opposite side from the "m".[75] Released around Christmas, these custom-printed M&Ms were originally intended for holiday greetings, but are now available all year round.
For the 2008 Valentine's Day season, Mars introduced all-green bags of M&Ms. This was due to common urban folklore that says green ones are an aphrodisiac.[76] The green ones were brought back for the 2009 season alongside the "Ms. Green Heats Up Valentine's Day" contest.
In October 2011, Mars released M&M's White Chocolate Candy Corn exclusively in the United States for Halloween. These candies come in three candy corn inspired colors: white, bright yellow, and bright orange.
The following is a summary of the changes to the colors of the flagship (milk chocolate) flavor, the only filling manufactured continuously since the beginning of the production of the confection. From 1941 until 1969, each package contained M&Ms in five different colors; when red M&Ms were reintroduced in 1987, they were added as a sixth color instead of replacing any of the existing colors.