Before doing anything else you will need to make sure that you have a watercolor set. If you do not have water coloring set, consider purchasing one from your local stationery store. Get an empty piece of paper and draw an equilateral triangle on it.
Create a blue circle at the bottom right point of the triangle using a blue paint and make a yellow circle at the highest end of the triangle using the yellow paint. Similarly, consider creating a red circle at the bottom left point of the triangle. Since red, yellow and blue are the primary colors here, you will be required to connect them to the color wheel.
Now, sketch another circle passing through the red, blue and yellow circles. Make green color by mixing equal quantities of yellow and blue colors. Create a green circle on the outline between the blue and yellow circle.
Make the purple colors by mixing equal quantities of red and blue colors. Again, make a purple circle on the line between the red and blue circles. Prepare the orange color by mixing the equal quantities of yellow and red paints, and paint an orange circle on the line between the yellow and red circles.
Make a line to connect secondary colors i.e. orange, green and purple. This will create another triangle of secondary colors.