Plain Screen
EN / 中文

Black — #000000

Black screen.

Pure #000000, edge to edge, no gradient and no vignette. This is the one most people came for.

01 — Panel

The panel

Any hex works. Patterns are drawn in CSS, so nothing blurs when the panel goes fullscreen.

#000000 · Flat · 1920 × 1080

Colour
Any hex works. Patterns are drawn in CSS, so nothing blurs when the panel goes fullscreen.
Pattern

Link to this colour

The address bar already holds the colour and pattern. Send this to someone and they get the same panel.
02 — Uses

What this colour is for

Dead pixels
A black field is the only test where a stuck pixel has nowhere to hide. Look for the one dot still glowing red, green or blue while the rest of the panel is off.
Backlight bleed
Dark room, full brightness, black panel. The glow in the corners belongs to the panel, not to whatever you were watching.
OLED at night
On OLED, black pixels are genuinely switched off. A black page is the least light a laptop can throw at a dark room without closing the lid.
The spare monitor
Park the second screen on black instead of a browser window you forgot to close.
03 — Step by step

Testing a screen with it

  1. Wipe the glass first

    At arm's length, dust looks exactly like a dead pixel. Clean it, then judge.

  2. Go fullscreen

    Press Fill screen. The panel takes the whole display, tab bar included.

  3. Look from two angles

    Straight on for dead pixels. Off-axis, in the dark, for bleed and clouding.

04 — FAQ

FAQ

Is this really #000000?

Yes. Not #111, not a dark grey. If it renders as washed-out grey, the GPU is probably set to limited RGB range — that's a driver setting, not this page.

Does a black screen save battery?

On OLED and AMOLED, yes, and you can measure it. On LCD the backlight still burns behind black, so the saving is small.

Will it stop my screen from sleeping?

No. That's a system power setting. A web page can't override it, and you wouldn't want one that tries.