What defects show on a blue screen?
Dead pixels appear dark; stuck pixels may show wrong colors as bright dots against blue.
Blue screen
A pure blue fullscreen activates only blue subpixels — ideal for channel tests and cool-toned ambient lighting.
Klicken für Vollbild
Wechselt alle 5 s: Weiß, Schwarz, Rot, Grün, Blau. Am besten im Vollbild. Alle Display-Tests →
Auflösungsvoreinstellung
Anleitung
- Open the blue screen page.
- Enter fullscreen via the button or preview.
- Scan for dead pixels or uneven blue intensity.
Warum einen Blue-Bildschirm nutzen?
Blue channel test
Reveal subpixel defects and uniformity issues specific to the blue channel.
Cool ambient light
Blue light can reduce harsh shadows in low-light creative setups.
Calibration reference
Use alongside white and grey screens to evaluate color temperature drift.
Blue screen diagnostics
Blue subpixels often show age-related issues first on some LCD panels — a full blue field makes weak zones visible.
Combine with red and green tests to map which channel causes tint shifts on your display.
Weitere Bildschirm-Tools
White-Bildschirm für Display-Test
Vollbild-white-Hintergrund öffnen
Black-Bildschirm für Display-Test
Vollbild-black-Hintergrund öffnen
Red-Bildschirm für Display-Test
Vollbild-red-Hintergrund öffnen
Green-Bildschirm für Display-Test
Vollbild-green-Hintergrund öffnen
Yellow-Bildschirm für Display-Test
Vollbild-yellow-Hintergrund öffnen
Orange-Bildschirm für Display-Test
Vollbild-orange-Hintergrund öffnen
Pink-Bildschirm für Display-Test
Vollbild-pink-Hintergrund öffnen
Purple-Bildschirm für Display-Test
Vollbild-purple-Hintergrund öffnen
Grey-Bildschirm für Display-Test
Vollbild-grey-Hintergrund öffnen
FAQ
Is blue light harmful?
Reduce brightness for long sessions. This tool does not increase emission beyond your panel settings.
Can I download 4K blue wallpaper?
Yes — select 4K (3840×2160) and download PNG.
Does it work on tablets?
Yes, in browsers that support fullscreen and canvas download.