Saying that blue is back is not strictly true. It never really left.
But maybe we can say that it is more popular than other colors right now. A lot of reports from the October High Point Market mentioned that blue was to be seen everywhere. Pantone has also named Monaco Blue as its top 2013 color. Leatrice Eiseman, the Executive Director of the Pantone Color Institute says the color "speaks to the practicality that we are seeing in society. You have to realize there is still concern out there for the economy."