If you want to paint the sea, watercolors are a great choice.
Painting a body of water can prove tricky. When the paint is applied directly to the paper, it can sometimes give off a look that isn't sheer enough, making the body of water look too solid. Watercolor paints are a terrific choice to paint bodies of water because there is an effect you can use that yields an attractive and accurate water effect. Wet on wet is a technique commonly used with watercolors. You can use it to create beautiful blending water effects if you are trying to paint the sea.
Instructions
1. Dip a large, soft-bristled paintbrush into clean water and hold it directly over your blue watercolor paint. Squeeze the bristles so the water drops into the color. Repeat with green watercolor paint. This will prepare the colors for easy use.
2. Dip the brush in the water again and coat the entire area on your watercolor paper where you'd like the sea to be. The paper should be shiny from the water but not saturated.
3. Dip the bristles into the wet blue watercolor paints and dab it over the wet paper. Do this quickly so the color can easily expand over the paper in an almost bleeding effect.
4. Repeat the method, painting on more clean water to the painting as necessary, to fill the area with the blue wet-on-wet effect. Leave the very tips of any waves edges untouched to stay white.
5. Add small touches of green amongst the wet blue. The green will blend into the blue smoothly and give the body of water more depth.
6. Allow the paint to dry completely.
7. Paint any details to the water, like ripples and wave outlines, over the dry paint using a thin paintbrush dipped in the blue.