Identify the complimentaries for color harmony with ease. They lie opposite each other on the palette.

In this painting, Elena Carafa by Degas, the artist based his color arrangment on the complementary pair orange-red and blue-green.

These two colors not only enhance each other visually but they are also mixing partners. As such they will give a particually wide range of colors; from bright highlights to neutalised (or dulled) hues, darks and light greys.

To be able to find such pairings, without hesitation, is an added bonus.