What color makes maroon?

Do you want a warm shade of maroon, or do you want it to be cool-something to consider.

Cool: Start with a primary red color, of course. Add a small amount of primary blue (you can always add more later, but too much will make purple), and then add black until you achieve the tone or value of maroon that you desire.

Warm: Same as above, except instead of the blue you would use a small amount of primary yellow to achieve a warm maroon that will have a hint of a brown color as its base (you can not add brown itself to it, as it is not a primary colour and will create mud).