Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Painter | Composition | Drawing | Color | Expression |
| --- | --- | --- | --- | --- |
| Andrea del Sarto | 12 | 16 | 9 | 8 |
| Federico Barocci | 14 | 15 | 6 | 10 |
| Jacopo Bassano | 6 | 8 | 17 | 0 |
| Giovanni Bellini | 4 | 6 | 14 | O |
| Sebastian Bourdon | 10 | 8 | 8 | 4 |
| Charles Le Brun | 16 | 16 | 8 | 16 |
| I Carracci | 15 | 17 | 13 | 13 |
| Cavalier D'Arpino | 10 | 10 | 6 | 2 |
| Correggio | 13 | 13 | 15 | 12 |
| Daniele da Volterra | 12 | 15 | 5 | 8 |
| Abraham van Diepenbeeck | 11 | 10 | 14 | 6 |
| Il Domenichino | 15 | 17 | 9 | 17 |
| Albrecht Dürer | 8 | 10 | 10 | 8 |
| Giorgione | 8 | 9 | 18 | 4 |
| Giovanni da Udine | 10 | 8 | 16 | 3 |
| Giulio Romano | 15 | 16 | 4 | 14 |
| Guercino | 18 | 10 | 10 | 4 |
| Guido Reni | x | 13 | 9 | 12 |
| Holbein | 9 | 10 | 16 | 3 |
| Jacob Jordaens | 10 | 8 | 16 | 6 |
| Lucas Jordaens | 13 | 12 | 9 | 6 |
| Giovanni Lanfranco | 14 | 13 | 10 | 5 |
| Leonardo da Vinci | 15 | 16 | 4 | 14 |
| Lucas van Leyden | 8 | 6 | 6 | 4 |
| Michelangelo | 8 | 17 | 4 | 8 |
| Caravaggio | 6 | 6 | 16 | O |
| Murillo | 6 | 8 | 15 | 4 |
| Otho Venius | 13 | 14 | 10 | 10 |
| Palma il Vecchio | 5 | 6 | 16 | 0 |
| Palma il Giovane | 12 | 9 | 14 | 6 |
| Il Parmigianino | 10 | 15 | 6 | 6 |
| Gianfrancesco Penni | O | 15 | 8 | 0 |
| Perin del Vaga | 15 | 16 | 7 | 6 |
| Sebastiano del Piombo | 8 | 13 | 16 | 7 |
| Primaticcio | 15 | 14 | 7 | 10 |
| Raphael | 17 | 18 | 12 | 18 |
| Rembrandt | 15 | 6 | 17 | 12 |
| Rubens | 18 | 13 | 17 | 17 |
| Francesco Salviati | 13 | 15 | 8 | 8 |
| Eustache Le Sueur | 15 | 15 | 4 | 15 |
| Teniers | 15 | 12 | 13 | 6 |
| Pietro Testa | 11 | 15 | 0 | 6 |
| Tintoretto | 15 | 14 | 16 | 4 |
| Titian | 12 | 15 | 18 | 6 |
| Van Dyck | 15 | 10 | 17 | 13 |
| Vanius | 15 | 15 | 12 | 13 |
| Veronese | 15 | 10 | 16 | 3 |
| Taddeo Zuccari | 13 | 14 | 10 | 9 |
| Federico Zuccari | 10 | 10 | 8 | 8 |
Question:
how many painters received a color mark below 10?
Answer:
21