answer:I don’t this so, and this snopes article discusses the etymology of the phrase. It most likely comes from the fact that when copiers didn’t exist, a single sheet of carbon paper would have a white, yellow and pink sheet. The person’s copy would be the pink one, while the company would keep the white and yellow ones. The National Institute of Health used to give scientists pink sheets containing the reviews of their grant proposals, which were just the carbon copy of the official sheet. Nowadays, the “pink sheet” at the NIH is a PDF file that is emailed to you. But, most people still call them pink sheets.