colour of law is a noun meaning "a mere semblance of legal right; something done with the apparent authority of law but actually in contravention of law". It carries one recorded sense.
a mere semblance of legal right; something done with the apparent authority of law but actually in contravention of law
“the plaintiff claimed that under color of law the officer had deprived him of his civil rights”
law
Definitions, synonyms and semantic relations for colour of law come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.