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The color alizarin crimson is a "cool" hue of the color red that is biased slightly more towards purple than towards orange on the color wheel. It is named after the organic dye alizarin, found in the madder plant, and the related synthetic lake pigment Alizarin Crimson. (From Wikipedia)
Alizarin is a compound of many elements. It is known as a dye. Alizarin was used as a red dye for the English parliamentary "new model" army. The distinctive red color would continue to be worn for centuries, giving English and later British soldiers the nickname of "redcoat". In 1869, it became the first natural pigment to be duplicated synthetically. (From Wikipedia)
Alizarin Crimson is a tint of maroon/crimson and it is a bright color, definitely a warm color.
Don't eat it, or misuse it!