Teletext-Tools 765 — Blue Screen

PURE BLUE FULLSCREEN

P765

Press START for a totally blue screen. No text. No UI.

Exit: press ESC (or tap/click screen).

CONTROLS

765

START BLUE SCREEN

START shows pure blue inside the screen.
FULLSCREEN attempts true fullscreen blue.
Tip: blue reveals tint and gradient issues.

STATUS

READY

ESC exits fullscreen (browser) and returns to tool.
Tap the blue screen to exit quickly.
Use with: 763 red + 764 green.

Quick jump: 763 Red Screen • 764 Green Screen • 767 Dead Pixel Test

1) Press START (pure blue appears)

2) Optional: press FULLSCREEN first

3) Exit: ESC or tap/click screen

Uniformity: patches and edge shading

Tint: areas that shift purple/cyan

Stuck pixels: confirm across RGB pages

Photosensitive users: avoid rapid switching.

Heat: phones can warm up at high brightness.

OLED: don’t leave static bright screens for hours.

Is it true blue? yes — overlay is #0000ff.

Looks different? colour profiles can shift saturation.

Seeing blotches? could be panel uniformity.

Dead pixels? confirm on 763 and 764.

Fullscreen blocked? browser policy.

Try again after a direct tap, or use START only.

Exit: ESC (desktop) or tap (mobile).

Best practice: cycle red → green → blue to confirm.

If a pixel stays bright: it may be stuck.

Solid blue can highlight banding and near-edge shading.

It also helps confirm whether a “hot” pixel shows on one colour only.

Exit instantly with ESC (or tap), and avoid long max-brightness runs.

761 Black • 762 White • 763 Red • 764 Green

766 Gradient Test • 769 Banding Test

blue screen • fullscreen blue • dead pixel test

screen uniformity • banding check • rgb display test