dark-green vs light-green

dark-green and light-green both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dark-green	No	Yes	No	No
light-green	No	Yes	No	No

As adjectives, dark-green and light-green are synonyms defined as:

dark-green and light-green: of the color between blue and yellow in the color spectrum; similar to the color of fresh grass

Other synonyms of dark-green include green, greenish.

dark-green (adjective)	light-green (adjective)
of the color between blue and yellow in the color spectrum; similar to the color of fresh grass	of the color between blue and yellow in the color spectrum; similar to the color of fresh grass