This prediction has happened. Blue has to be a reference to police.

Notes on 4-5-15  Then it switched: I had a visual I was standing behind the back of a van. Someone opened the vans back door and there was a bomb. In the visual the van was white but as the doors closed it changed colors to blue.

The facts by (CNN) “A man unleashed a barrage of gunfire on Dallas’ police headquarters and planted explosives outside the building early Saturday — narrowly failing to wound anyone — leading to a chase to a suburb that ended with officers shooting him in his parked van at a restaurant parking lot.

Police believe they killed the suspect, though they haven’t confirmed his death yet. Late Saturday morning were using a robot to probe the van in the suburb of Hutchins because the suspect claimed he had rigged the vehicle with explosives, Dallas Police Chief David Brown told reporters.

“We believe this suspect meant to kill officers,” Brown said. “We barely survived the intentions of this suspect.”

Police planned controlled explosions at the van in the parking lot of a Jack in the Box restaurant to ensue the vehicle could be safely approached, Brown said. Quoted by http://edition.cnn.com/2015/06/13/us/dallas-police-headquarters-shooting/index.html?eref=edition