[header] How to make brown food coloring [title] Find two colored dyes that are opposites on the color wheel. [step] Red and green, orange and blue, or yellow and purple can all be combined to make brown. [substeps] You can use liquid or gel food dye. 
Gel food dye is usually preferred because you don't need very much to get vivid colors. [title] Mix the color in a 1:1 ratio.