Columbia subject headings:
Color (Philosophy)
Color--Psychological aspects.
Philosophy, Ancient.
Harvard subject headings:
Color (Philosophy)--Congresses.
Color--Psychological aspects--Congresses.
Colors--Psychology--Congresses.
Symbolism of colors--Greece--Congresses.
Symbolism of colors--Rome--Congresses.
Princeton subject headings:
Color (Philosophy)
Color--Psychological aspects.
Philosophy, Ancient.