NEW YORK (REUTERS) - The United Nations has been accused by some of its staff of racism after it issued a survey that included a question asking how they identify themselves, and offered 'yellow' among the possible responses.

The UN Survey on Racism was sent to thousands of staff on Wednesday (Aug 19).

An email accompanying the survey said it was being carried out as part of UN Secretary-General Antonio Guterres's "campaign to eradicate racism and promote dignity."

But the first question, on how staff identify themselves, itself reflected an historic Western racist view of Asians by listing 'yellow' as an option, several UN staffers told Reuters.

Other categories offered were black, brown, white, mixed/multi-racial and any other.

"The first question is insane, deeply offensive and hard to fathom how in an organisation as diverse as the United Nations this question was approved for release in a system-wide survey,"said one UN staff member, speaking on condition of anonymity.

The United Nations did not immediately respond to a request for comment on the survey.

Erica Foldy, an associate professor at the Wagner Graduate School of Public Service at New York University, said the use of the term was not acceptable.

"The term 'yellow' to refer to people of Asian descent is a slur. It should not be used, period. At the same time, it is useful to remember that language related to race is complex and always in flux," she said.

"Recently Brown, which had been considered something of a slur (though perhaps never as problematic as yellow) has come into broad use. But I don't see that happening with 'yellow',"Foldy said.

The email accompanying the survey, seen by Reuters, says: "This survey will provide us with the needed data to understand the depth of racism within the United Nations."

It adds, "we are not immune to the issue."

Organisations and companies have been under increasing pressure to address racism in the wake of global protests sparked by the death of George Floyd, a Black American who died in May after a white police officer knelt on his neck.