wheat vs pale yellow

wheat and pale yellow both are nouns.

Word	Noun	Adjective	Verb	Adverb
wheat	Yes	No	No	No
pale yellow	Yes	No	No	No

As nouns, wheat and pale yellow are synonyms defined as:

wheat and pale yellow: a variable yellow tint; dull yellow, often diluted with white

Other synonyms of wheat include straw.

wheat (noun)	pale yellow (noun)
a variable yellow tint; dull yellow, often diluted with white	a variable yellow tint; dull yellow, often diluted with white
grains of common wheat; sometimes cooked whole or cracked as cereal; usually ground into flour
annual or biennial grass having erect flower spikes and light brown grains