An online job posting for a Manhattan school district specifically sought “teachers of color” amid an alleged push by Schools Chancellor Richard Carranza to combat “toxic whiteness” in Big Apple public schools, The Post has learned.

The help-wanted ad, which was spotted by a former teacher on April 27, was linked to an invitation to a May 14 job fair sponsored by the district, which covers the East Village and part of the Lower East Side.

The racially targeted post on Indeed.com said Community School District 1 was seeking “teachers of color for the 2019-2020 school year.”

The district includes some top schools, including the highly rated PS 110 Florence Nightingale.

“We are committed to diversifying our teaching staff to better serve the diverse populations we serve,” read the invite, posted on the Eventbrite ticketing site by Irene Sanchez, principal of PS 15 Roberto Clemente.

The help-wanted ad disappeared from Indeed a day after former teacher Dawn Donohue saw it and took a screenshot.

According to the federal Equal Employment Opportunity Commission, it is “illegal for an employer to publish a job advertisement that shows a preference for or discourages someone from applying for a job” due to race, color, religion, sex or other characteristics.

Word of the posting comes amid mounting controversy over Carranza’s racial “equity” initiatives — which critics say include pushing the concept of “toxic whiteness” — and his denials that he’s biased against white teachers and staffers, as alleged in a $90 million discrimination suit by three DOE officials filed last month.

“This job posting is a continuation of fighting discrimination with more discrimination and underscores our clients’ allegations, namely, that they were targeted for demotion in responsibility and role on the basis of their race and gender,” said lawyer Davida Perry, who represents the plaintiffs in that case.

A DOE spokesman said the ad “was not authorized” and that officials “are investigating to determine follow up action.”

“This was a mistake by one school and it shouldn’t have happened,” said spokesman Doug Cohen, adding that the job fair was “open to all candidates.”

Manhattan employment lawyer David Gottlieb said the ad “creates a very strong inference that they are favoring a particular racial group in the hiring process.”

“So, playing this out, if a qualified applicant who is not a person of color is denied the job, that person could bring a claim for discrimination and that job posting would be strong evidence that race/color played a factor in the decision,” he added.

Lawyer Michael O’Neill, who specializes in civil rights and labor law, said the ad “without a doubt” violated the city Human Rights Law, which prohibits employment discrimination.

Sanchez didn’t return a request for comment.