How Titian Depicted Sky - What Colors he Used

Let's look at the blue skies in Titian's painting separately. The sky gets more intense and deep blue coats of ultramarine was placed over the underpainting based on azurite. The examination of a sample above Ariadne's head shows that an underpainting of the sky was made with azurite and white pigments. Ultramarine was used in small quantities. It was mixed with white and is found in the upper part of the sky. In this painting, the cloudy sky was done with warm gray paint that consists mainly of white pigment with the addition of yellow earth and some red earth in small quantities. The foliage of the trees was painted over the sky. Confirms that Titian painted it with a strict layer structure.