The majority of the colors identified in the paintings of Rubens and Titian fall within the orange/brown spectrum. For Rubens it is more 75% of all the colors that are brown. While in Titian's painting it is somewhere between 50% and 75%. A big part of Titian's chart also shows a great amount of blue which is in the range to complement orange/brown The other colors that present are red, yellow and green.
Most Prominent colors that were picked up by the algorithm are brown/orange, red, blue, yellow.