NoCast

NoCast is a webpage by Matthew Grupenhoff that flashes a various shades of blue on the screen in a strategic way so that there will be no harmful effects on a student's eyes if they run it with night mode on.

This only works on Chromebooks; Mac users will still see the flashing.

On November 12, 2021, website-specific scripts were also added, allowing the flashing to be added to a select set of websites.