In Renaissance paintings like Duccio's Maestà and Van der Weyden's Descent From the Cross, this is the traditional color of the Virgin Mary's robe.
The upper portion of each month in the Calendar from the Très Riches Heures of the Duc de Berry is in this color. This was the royal color of the Valois kings of France. In Titian's Bacchus and Ariadne, this is the color of Ariadne's robe, causing her to blend in slightly with the background. In Renaissance paintings like Duccio's Maestà and Van der Weyden's Descent From the Cross, this is the traditional color of the Virgin Mary's robe. Expensive lapis lazuli was used to make a pigment of this color called ultramarine. Another pigment of this color is made from the indigo plant. For 10 points, identify this color used for the sky in Giotto's Lamentation and many other works.
The upper portion of each month in the Calendar from the Très Riches Heures of the Duc de Berry is in this color.
blue [accept indigo and ultramarine before they are mentioned]