Dark mode web designs display light-colored text and visuals over a dark background, in contrast to the light-background, dark-text websites that have defined the past decade of web design. Sometimes referred to as “dark theme” or “night mode,” dark mode became a more prevalent web design trend as users started to note the strain of blue light from their devices, especially at night or in dark settings. Black backgrounds in website design are thought to emit less blue light, making the screen easier on the eyes.