Protesters taunted a white Chicago cop as a “blue-eyed devil” when he arrived at court Tuesday to face murder charges in the shooting death of a black teen — as Mayor de Blasio voiced sympathy for his embattled Windy City counterpart, Rahm Emanuel.

Jason Van Dyke, 37, who shot Laquan McDonald 16 times last year, remained silent as he worked his way through a scrum of reporters outside the Cook County Criminal Court.

A lone heckler persistently plagued his progress.

“Here’s the blue-eyed devil, ­everybody! Blue-eyed devil!” shouted the protester, who also called the cop a “disgrace.”

Inside the courthouse, Van Dyke’s lawyer entered not-guilty pleas on the suspended cop’s behalf to six counts of murder and one count of official misconduct in the October 2014 slaying of McDonald, 17.

Later Tuesday, De Blasio defended Emanuel, who has faced mounting calls to resign amid allegations that authorities covered up McDonald’s killing to aid Emanuel’s April re-election effort.

“I would say Rahm Emanuel is needed at his post,” de Blasio said. “He’s literally the only person who can make these changes.

“I can relate to some of the challenges that Rahm Emanuel is going through,” added de Blasio, who has heard similar calls of no confidence, especially from members of the NYPD.

“Folks who are calling for his resignation I don’t think are thinking through the whole equation.”

Warning: Graphic content

After court on Tuesday, defense lawyer Dan Herbert said Van Dyke, who remained free on $1.5 million bond, wanted to share his side of the racially charged incident so that he’s not seen “as this coldblooded killer.”

Police dashcam video shows Van Dyke opening fire after hopping out of a cruiser as the teen runs along the middle of the street.

On the video, McDonald appears to be veering away from Van Dyke and other cops before he’s shot and crumples to the pavement.

Authorities have said the teen was carrying a knife and had the drug PCP in his system at the time.

The video wasn’t released until shortly after Van Dyke’s arrest last month, following a judge’s order that it be made public.

Emanuel, meanwhile, cut short a vacation in Cuba this week to deal with fallout from another police shooting, in which a 19-year-old man and a 55-year-old woman were slain early Saturday.