Why test with a red screen?
Red isolates one RGB channel, making certain stuck or dead pixels easier to see than on mixed content.
A uniform red screen isolates the red color channel so you can spot dead pixels, stuck subpixels, and panel uniformity issues.
Défile blanc, noir, rouge, vert et bleu toutes les 5 s. Idéal en plein écran. Tous les tests d'affichage →
Préréglage de résolution
Verify the red channel renders evenly from edge to edge on LCD and OLED panels.
Pixels stuck on green or blue may appear as contrasting dots against pure red.
Red provides dramatic ambient light for photography, streaming, or creative setups.
Cycling red, green, and blue fullscreen colors is a standard quick test for subpixel defects without specialized software.
Perceived red brightness depends on gamma and color temperature — compare results with white and black for context.
Ouvrir le fond white en plein écran
Ouvrir le fond black en plein écran
Ouvrir le fond green en plein écran
Ouvrir le fond blue en plein écran
Ouvrir le fond yellow en plein écran
Ouvrir le fond orange en plein écran
Ouvrir le fond pink en plein écran
Ouvrir le fond purple en plein écran
Ouvrir le fond grey en plein écran
Red isolates one RGB channel, making certain stuck or dead pixels easier to see than on mixed content.
Yes. Cycle red, green, blue, white, and black for a thorough channel and contrast check.
Use the download controls to export PNG at your chosen resolution.
Lower brightness for extended use and take regular breaks like any bright display.