In the movie "The Devil Wears Prada"... there was a scene where Anne Hathaway's character had a lumpy blue sweater. Miranda Priestley informed her that the sweater is not just blue, it’s not turquoise, It’s not lapis... It’s actually cerulean.

Maybe that's what "cerulean blue effective immediately" refers to. Their discussion was about how one fashion designer showcased "cerulean blue" one season, and it became a fashion hit and a must-have color for that year. Of course, Anne was wearing the sweater 2-years after it went out of fashion.

It may mean that it's time to effect some change in perspective, or some change in marketing or to show people some new aspect of something. Cerulean Blue might be a call for revealing something to the public that will change attitudes.