[header] How to make maroon [title] Get primary red, blue, and yellow paint or dye. [step] Maroon is primarily made up of red and blue. Yellow is generally then used to add brownish undertones as necessary. 
Using pure, primary colours generally works best to create new colours. If you're using non-primary colours, do an internet-research or read your paint or dye's container carefully to determine any undertones and see if they are suitable for creating maroon.