Black Screen
A full black screen is the quickest way to see what your display does when it shows nothing at all. It exposes backlight bleed on LCD panels, shows how deep the blacks go on OLED, and doubles as a plain dark background when you want the room dim.
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What this colour is good for
- Checking IPS glow and backlight bleed in a dark room — the only honest test.
- Seeing how uniform an OLED panel is at pure black, and whether it really turns pixels off.
- Using the display as a dim, low-power background instead of a screensaver.
On an LCD, black still means the backlight is on — you are dimming light, not stopping it. Only OLED pixels genuinely switch off at #000000.
Frequently asked questions
Does a black screen really save battery?
Only on OLED. Each pixel at #000000 is switched off, so a mostly-black screen draws much less power. On an LCD the backlight stays on regardless of what colour you show, so the saving is negligible.
Why do I see grey patches on a black screen?
That is backlight bleed or IPS glow. It is a property of the panel, not of this page. Turn the room lights off and view straight on to judge how bad it is.