To create robin's egg blue, mix a blue pigment such as phthalo blue with a yellow such as cadmium yellow to create a deep cyan. Add titanium white or zinc white to lighten the color and a diluting medium, such as an acrylic paint thinner or linseed oil, to create the desired saturation and consistency. Have an appropriate-sized container, several different sizes of measure and a wooden stick on hand for mixing the paint.
- Mix the yellow and blue paints
Mix approximately one part yellow to two parts blue. Stir thoroughly and assess the color. If it is too blue for your taste, add a small amount of yellow. If it is too green, add a small amount of blue. Continue adding small amounts of color, mixing thoroughly after each addition, until you have the desired color.
- Tint the color with white
Mixing two intense pigments typically creates a very dark color, so lighten it by adding white to the mixture. Add small amounts of white at a time, mixing thoroughly after each addition until you have lightened the color sufficiently.
- Dilute the paint
Use a commercial acrylic or latex polymer to dilute the paint to the desired consistency and color intensity. Use water very sparingly; too much water added to either acrylic or latex paints causes them to break down. If you are working with oil paints, dilute them with linseed oil.