graph vs color chart

graph and color chart both are nouns.

Word	Noun	Adjective	Verb	Adverb
graph	Yes	No	Yes	No
color chart	Yes	No	No	No

As nouns, color chart is a hyponym of graph; that is, color chart is a word with a more specific, narrower meaning than graph:

graph (noun)	color chart (noun)
a visual representation of the relations between certain quantities, represented as points, plotted with reference to a set of axes	a chart displaying colors
a visual display of information
a written symbol that is used to represent speech

graph (verb)	color chart (verb)
represent by means of a graph
plot upon a graph