Paul Hebert has done the research and visualized the Colors Used by the Ten Most Popular Sites on the Internet. You can see the fan chart above with changing background color that reveals some of the hidden colors.
The Internet is primarily blue!
Paul Hebert:
I was curious what colors were being used by large, popular sites, so I decided to find out.
By displaying the colors used in popular sites in a variety of ways we can glean interesting conclusions about modern trends in web design. Organizing the colors by hue, saturation and value provides viewers with a variety of different ways to view the data. Instead of forcing conclusions upon the user this visualization provides them with the information they need to draw their own insights. I scraped the data using PHP, then built the page using PHP, HTML, SCSS, and Javascript.
This data is current as of September 18th, 2016.
Although I've tried to make this site as accurate as possible there are some known issues which have not yet been resolved.
All of the visualizations on the original site are interactive with pop-up information on the actual color, but you can see a few of the other static visualizations here.
Found on this great write-up by Wired