Columbia subject headings:
Color in art.
Painting--Technique--History--19th century.
Painting--Technique--History--20th century.
Harvard subject headings:
Color in art.
Painting, Modern--19th century
Painting, Modern--20th century
Painting--Technique
Princeton subject headings:
Color in art.
Painting, Modern--19th century.
Painting, Modern--20th century.
Painting--Technique.