P765 TELETEXT-TOOLS 765 Wed 01 Jan
00:00/00PAGE765
TELETEXT-TOOLS
BLUE SCREEN
Pure blue fullscreen screen • stuck pixel checks • tint diagnostics • RGB testing
BLUE SCREEN TOOL — START, FULLSCREEN, EXIT WITH CLICK OR ESC
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PURE BLUE SCREEN

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BEST FOLDER: /blue-screen/
Start a clean #0000ff blue output for screen testing.

START BLUE SCREEN

START covers this page in pure blue.

CLICK the blue output to exit.

ESC also closes the blue screen.

FULLSCREEN MODE

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Use fullscreen for edge-to-edge blue display testing.

FULLSCREEN CONTROL

STATE
READY — BLUE SCREEN OFF

FULLSCREEN requests browser fullscreen.

NOTE browsers require a real click.

USES & RELATED TESTS

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Quick links and common uses are separated for safer small-screen layout.

USES

Check blue sub-pixels and stuck pixels.

Reveal tint shifts and edge shading.

Compare with red and green screens.

TIP use with RGB colour tests.

RELATED TESTS

HOW TO USE BLUE SCREEN

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Use this page for a clean pure blue output without extra panels on top.

BASIC USE

Press START to show pure blue.

Click the blue screen to return.

Press ESC to exit quickly.

Use FULLSCREEN for edge-to-edge testing.

PIXEL CHECKS

Look for black dots on blue.

Look for red or green dots.

Compare with red and green screens.

Confirm with dead pixel test.

DEVICE TIPS & SEARCHES

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Testing is clearer when display settings are steady and the panel is clean.

DEVICE TIPS

Clean the screen before checking.

Disable auto brightness briefly.

Use normal viewing distance first.

Avoid rapid colour switching.

COMMON SEARCHES

blue screen fullscreen

blue screen test online

blue monitor test

pure blue screen

BLUE SUB-PIXEL CHECKS

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A blue screen isolates the blue channel and helps reveal stuck sub-pixels.

WHAT TO LOOK FOR

Black dots may be dead pixels.

Wrong-colour dots may be stuck pixels.

Purple or cyan shifts may show tint.

Check from several angles.

RGB TESTING

Red checks red sub-pixels.

Green checks green sub-pixels.

Blue checks blue sub-pixels.

White checks full brightness.

TEST METHOD

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Scan slowly and compare against the other RGB screens.

TEST METHOD

Open blue fullscreen.

Scan slowly in rows.

Repeat on red and green.

Use dead pixel page for cycling.

SEARCH INTENT

blue pixel test

RGB screen test

monitor blue screen test

phone stuck pixel test

DISPLAY DIAGNOSTICS

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Solid blue can reveal tint, banding and panel uniformity issues.

TINT AND SHADING

Check if blue looks even.

Look for purple or cyan patches.

Compare corners and centre.

Some panel variation is normal.

COLOUR SETTINGS

Night mode may change blue.

Colour filters may alter output.

HDR modes may change brightness.

Use normal display mode for testing.

COMFORT & SEARCHES

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Solid colours can feel intense, so use a comfortable brightness.

COMFORT NOTE

Solid colours can feel intense.

Take short breaks.

Avoid rapid flashing.

Lower brightness if needed.

COMMON SEARCHES

blue display test

blue screen monitor test

blue tint checker

blue screen for stuck pixels

TROUBLESHOOTING

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If fullscreen does not start, use START first and then press FULLSCREEN again.

FULLSCREEN ISSUES

Browsers require a user click.

Try pressing FULLSCREEN again.

ESC exits fullscreen on desktop.

Mobile browsers vary by device.

BLUE LOOKS WRONG?

Disable blue-light filters.

Disable colour correction modes.

Check monitor colour temperature.

Try another browser if unsure.

PAGE CONTROLS & PRIVACY

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Keyboard controls and privacy notes are separated to avoid crowding.

PAGE CONTROLS

Arrow keys move help pages.

ESC returns to page one.

Click blue output to exit.

Footer links still navigate pages.

PRIVACY

No files are loaded.

No data is uploaded.

The tool only changes screen display.

Runs fully in the browser.

RELATED SCREEN TOOLS

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Use blue screen with the rest of the screen test and display tools cluster.

PARENT LINKS & INDEXING

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Final navigation and indexing summary for this blue screen tool.

PARENT LINKS

INDEXING SUMMARY

Canonical URL: /blue-screen/

Page purpose: pure blue screen tool.

Previous: 764 Green Screen.

Next: 766 Gradient Test.