E Ink, the popular company that provides paper-look gray-scale displays for eReaders, reported consolidated revenues of $48.02 million in January, down 63.6% from the same month last year and 11% sequentially. The growing popularity of media tablets with full-color displays likely played a big role in the decline — sales of Amazon’s Kindle Fire and Barnes & Noble’s Nook Tablet are thought to be eating into the companies’ respective dedicated eReader businesses to an extent. Even though E Ink’s revenue took a nose dive in January, the company said that it expects to post revenues of $1.35 billion this year, up 5% from 2011.