Emblematical in a sentence as an adjective

"[6] In explaining the white background, Thompson wrote, "As a people we are fighting to maintain the Heaven-ordained supremacy of the white man over the inferior or colored race; a white flag would thus be emblematical of our cause.

Emblematical definitions

adjective

serving as a visible symbol for something abstract; "a crown is emblematic of royalty"; "the spinning wheel was as symbolic of colonical Massachusetts as the codfish"

See also: emblematic symbolic symbolical