What is the most prevalent M&M color?!

blue :)

1930s to 1940s
When operations were started, the hard-coated chocolates were made in five colors: red, yellow, brown, green, and violet. They were served in a cardboard tube (similar to Smarties).

1950s to 1960s
In 1950, a black "M" was imprinted on the candies. It was changed to white in 1954.
Peanut M&M's were introduced in 1954, but were never made in the tan color. In 1960, Peanut M&M's added the yellow, red, and green colors.

1970s and 1980s
Red candies were eliminated in 1976[9] due to health concerns over the dye amaranth (FD&C Red #2), which was a suspected carcinogen, and were replaced with orange-colored candies. This was done despite the fact that M&M's did not contain the dye; the action was purely to satisfy worried consumers. Red candies were reintroduced later, but they also kept the orange colored M&M's.

1990s
In 1991, Peanut Butter M&M's were released. These candies have peanut butter inside the chocolate center and the same color scheme as the other brands.
In 1995, Mars ran a promotion in which consumers were invited to vote on which of blue, pink, or purple would replace the tan M&M's. Blue was the winner, replacing tan in early 1995.
Concurrent with the Blue M&M campaign, M&M's introduced computer animated "spokescandies" in their television commercials. These include the team of the cynical and sardonic "Red" (originally voiced by Jon Lovitz, thereafter Billy West), who is the mascot for milk chocolate M&M's, and the happy and gullible "Yellow" (originally John Goodman, thereafter J.K. Simmons), who is the mascot for peanut M&M's. Other mascots include the "cool one", Blue (originally Phil Hartman, thereafter Robb Pruitt) for almond; the seductive Green (Cree Summer) for mint and dark chocolate (Green is the only female M&M's mascot); and the slightly neurotic Orange (Eric Kirchberger) for peanut butter and Pretzel M&M's. Although brown M&Ms have been around since the beginning of the candy, no brown M&M "spokescandy" was included.

2000–2005
In 2000, "Plain" M&M's (a name introduced in 1954 when Peanut M&M's were introduced) were renamed "Milk Chocolate" M&M's (presumably because "plain" sounded too negative), and pictures of the candy pieces were added to the traditional brown and white packaging
In 2002, Mars solicited votes to their first ever "M&M's Global Color Vote, to add a new color from three choices: aqua (turquoise), pink, and purple. This time, purple won and was featured for a limited time
Since 2005 M&M's have been available online in 17 colors, with personalized phrases on each candy on the opposite side from the "m".[18] Released around Christmas, these custom-printed M&M's were originally intended for holiday greetings, but are now available all year round
In April 2005, M&M's ran the "mPire" promotion to tie in with the Star Wars Episode III: Revenge of the Sith movie release. M&M's were offered in dark chocolate varieties (Regular and Peanut) for the first time after a string of Addams Family M&M's commercials.
In the summer of 2005, Mars added "Mega M&M's" to the lineup.[19] These candies are 55% larger than the traditional M&M's and are available in milk chocolate and peanut varieties. Most of the colors for Mega M&M's were also changed to less-bright colors — teal (replacing green), beige (orange), maroon (red), gold (yellow), blue-gray (blue), and brown — to appeal more to adults. In the fall of 2005, the mPire promotion ran again to coincide with the DVD release of the Star Wars movie.

2006–present
Also in 2006, the company piloted White Chocolate M&M's as a tie-in with their Pirates of the Caribbean promotion.
During the 2008 Valentine's Day season Mars introduced bags of all-green M&M's.

more on: http://en.wikipedia.org/wiki/M%26M%27s

Yellow

Orange

orange duhh

brown

red

brown i think