Which M&M's character was introduced last to the core lineup of mascots?

M&M's colorful characters have become iconic in food marketing history, representing one of the most successful and recognizable brand mascot campaigns in the confectionery world. Since their introduction, these anthropomorphic chocolate pieces have evolved in personality and appearance, helping Mars build incredible brand recognition. Test your knowledge about the famous M&M's mascots that have been entertaining consumers in commercials and advertisements for decades!

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Ms. Brown (the brown M&M)
Blue (the blue M&M)
Green (the green M&M)
Orange (the orange M&M, also known as Crispy)