In what he described as a “milestone achievement” for pay equity, Mayor de Blasio on Thursday signed a law barring employers from asking about a job applicant’s salary history.

“It is unacceptable that we’re still fighting for equal pay for equal work. The simple fact is that women and people of color are frequently paid less for the same work as their white, male counterparts,” he said.

Applicants who believe than an employer has violated the law, which takes effect in 180 days, can file a complaint with the city’s Human Rights commission, which can impose penalties of up to $250,000.