Magenta Screen Test
Pure magenta (#FF00FF) full-screen display for stuck green pixel detection, red+blue channel accuracy, and display color calibration testing.
Or press F11 · Mobile: double-tap
How to Use
Magenta as a Stuck Green Pixel Detector
Magenta is the complementary color of green. It is produced by activating the red and blue sub-pixels at full brightness while the green sub-pixel is completely off. This makes magenta uniquely effective at revealing stuck green sub-pixels — they appear as vivid green dots against the magenta background and are impossible to miss. Green stuck pixels are actually the most common type of stuck pixel failure, so the magenta screen is one of the most useful diagnostic tests.
Magenta in Print & Design Workflows
Magenta (M) is one of the four CMYK process ink colors used in professional printing. For designers and print professionals, accurate magenta reproduction on screen is critical — a monitor that shows magenta as too red or too purple will cause color-matching errors between screen proofs and physical prints. This pure magenta (#FF00FF) test lets you verify your display accurately reproduces the magenta reference point before starting color-sensitive work.
The Complete Secondary Color Test Explained
The three secondary colors (yellow, cyan, magenta) form the most targeted stuck-pixel test suite because each one deactivates exactly one primary channel, exposing any failure in that channel with maximum contrast:
Yellow (#FFFF00)
Channels: Red + Green ON, Blue OFF
Detects: Stuck blue sub-pixels appear as blue/cyan dots
Cyan (#00FFFF)
Channels: Green + Blue ON, Red OFF
Detects: Stuck red sub-pixels appear as red/orange dots
Magenta (#FF00FF)
Channels: Red + Blue ON, Green OFF
Detects: Stuck green sub-pixels appear as green dots
Frequently Asked Questions
What does a magenta screen test reveal?▼
The magenta screen test is specifically designed to detect stuck green sub-pixels, which appear as bright green dots against the pink-purple background. It also detects dead pixels (black dots), hot pixels (white dots where all three sub-pixels are stuck), and tests the uniformity and accuracy of your red and blue channels.
Why does my magenta look pink or purple?▼
Pure magenta (#FF00FF) should look like an equal blend of red and blue — often described as "hot pink." If it looks too pink/red, your red channel is stronger than blue. If it looks too purple, the blue channel dominates. Adjust the RGB gain in your monitor's OSD settings. The display's color temperature preset can also cause this — the sRGB or Native preset usually gives the most accurate results.
Are stuck green pixels common?▼
Yes — green stuck pixels are actually the most frequently reported stuck pixel type. This is because the human eye is most sensitive to green wavelengths, making even small green anomalies more noticeable. The green sub-pixel is also typically the most energized in displays (contributing most to perceived brightness), and some display panels show higher failure rates in the green channel.
What is the difference between magenta and pink?▼
Magenta (#FF00FF) is a pure digital color at maximum saturation — equal parts red and blue with no green. Pink is a lighter, less saturated variant that includes white (meaning some blue and green channel mixing). For pixel testing purposes, pure magenta provides the highest contrast against green defects. A pink screen would be less effective as the green channel would be partially active.