This method measures an all-white screen with an all-black screen ... s black levels look washed out and gray, its contrast ...

If you have changed Accessibility settings and enabled High-contrast themes or color filter option on Windows, your your computer screen may turn black and white. To change High Contrast Theme ...

Color contrast refers to the difference between the brightness of the background color and foreground color of digital content. Black text on a white background is very high contrast; light grey text ...