Mixing watercolor and acrylic paints provides a major advantage for paintings that require a lot of blending. The watercolor makes it easier to blend the paint while the acrylic allows the color to stay bright and solid. Mixing the paints is simple, if you know how much of each paint to use and what type of paper to use it on.
Squeeze one part acrylic paint and one part watercolor paint from a tube--in the color of your choice--on to a paint palette or paper plate.
Use a paintbrush to mix the different paints well.
Apply the paint to watercolor paper as usual. If you want to blend two colors together, paint them side by side and wash the brush with water. Tap the slightly dampened brush over the line until the colors melt together. If the paint isn't blending enough, put a little bit more water on the end of the brush.