Open a can of wood stain and place it on a piece of newspaper.
Place an unfinished wood board next to the container. You will use this board to test the stain as you add color to it.
Paint a small amount of wood stain onto the board to identify the regular color of the stain.
Pour one tbsp. of universal colorant into the stain, and mix the stain well with a paint stirrer. You can purchase universal colorant in a variety of colors at a hardware store.
Paint a small amount of the stain onto the wood board next to the original stain. Continue adding colorant and testing the stain in this manner until you are satisfied with the color of the stain.