Magenta Screen

How to use a magenta screen

A display mixes every color from red, green, and blue subpixels. Pure magenta, #FF00FF, turns the red and blue subpixels fully on and leaves green off. It is a common step in a pixel check, alongside the single colors and the other two-color mixes: a pixel that is missing one of the lit colors changes color, and a green subpixel that is stuck on stands out strongly.

1. 1

   Open it full screen. Browser toolbars around the field hide the edges and corners, where faults often sit.

2. 2

   Turn off color filters. Night mode and blue-light filters reduce blue, which pushes magenta toward red.

3. 3

   Clean the display first. A speck of dust can look like a dark pixel. If it wipes away, it was not a fault.

4. 4

   Scan slowly. Work across the screen one section at a time from your usual distance.

What a magenta screen can reveal

A blue dot is a pixel whose red subpixel does not light, and a red dot is one whose blue subpixel does not light. A fully dark dot means neither lights.

A green or pale dot is a pixel with its green subpixel stuck on.

Uneven tint, such as areas that lean toward pink, red, or purple, can point to uneven backlighting or panel variation. A small amount is normal on many displays, so check the manufacturer's warranty terms before deciding a panel is faulty.

A full pixel check

Magenta has green off, so it cannot show whether the green channel works. If the White Screen looks pink or magenta across the whole display, check green directly with the Green Screen. Together with the Yellow Screen and the Cyan Screen, magenta covers each pair of subpixels. Confirm any dot that stays put with the Dead Pixel Test.

This screen's exact value has its own #FF00FF color page, with its RGB and HSL values and its contrast against black and white.