It depends on what colors you use. The best way to get a bright orange, or at least as bright as it could be, is to mix cadmiun yellow and red.
Mix red and yellow. Orange is a secondary color, which means that you can make it by combining two primary colors. The two primary colors needed for orange.
I was just painting and I need orange to be able to decorate the picture RE: How Do You Make Orange When Mixing Paint? I was just painting.