It is the ratio as well as the specific pigments used that determine the specific neutral color these hues will make. The long answer to mixing brown.
You can include a tiny amount of white to make the brown lighter.
How to make brown paint by mixing colors. First of all you need to get a color wheel that includes all these three types of colors. If you want a lighter earthier brown add a little more yellow. The three primary colors red yellow blue when mixed make brown.
For a deeper purplish brown add a little more blue. You can also mix 2 complementary colors together to make brown like blue and orange red and green or yellow and purple. Only add tiny amounts each time until you get the right color.
Adding more red will create a deep gray brown with a hint of orange in it. From a color wheel mix the yellow color with blue to get green and then mix green with red to get a brown color. These include primary colors secondary colors and tertiary colors.
The complete answer to mixing brown is complex and touches on several color theory concepts. Many will recommend using black paint to create a dark brown. To make brown paint using primary colors mix together equal parts yellow red and blue paint.
How to mix brown the short answer. If you want to mix paint colors to make brown mix all of the primary colors together which are blue yellow and red. There are a few colors that may help you to make brown paint.
If you want your brown paint to be lighter mix it with a little bit of white. Combine the red blue and yellow colors using a palette knife or your brush until it reaches a brown color.