How dark does a background have to be before white text shows up better than black text?

1. Is it easier to read white text on a black background?
2. Which background color is best for white text?
3. Why is white text on black background blurry?
4. Is it easier to read white text on black or black background on white background?

Is it easier to read white text on a black background?

While white text on a black background provides very high value contrast, it is less readable and causes greater eye fatigue than black text on a white background. All light-colored text on dark backgrounds causes eye fatigue.

Which background color is best for white text?

Black backgrounds: High-chroma colors are best for black backgrounds because they offer a good contrast ratio without the eye fatigue (which occurs with white text on a black background).

Why is white text on black background blurry?

There is a myth about white text over black backgrounds being the best color contrast combination for accessibility, but in reality, white text on black backgrounds creates a visual fuzzing effect for people with astigmatism called “halation”.

Is it easier to read white text on black or black background on white background?

From a specific focus on color in this research: “… The most readable color combination is black text on white background; overall, there is a stronger preference for any combination containing black […]