Quick answer
A magenta screen fills your entire display with solid magenta (#FF00FF). Click Fullscreen or press F and every pixel shows the same color, with no toolbars or distractions. Magenta lights red and blue while keeping green off, which makes stuck green subpixels and green tints obvious during display tests.
Built and tested by Whitson Rao
Use cases
A failed red or blue subpixel turns into a colored dot on magenta.
Magenta contains no green, so a stuck green subpixel appears as a white dot.
Add a bold neon magenta glow to photos, videos, or workspace backgrounds.
Compare how pinkish or purplish magenta looks across different displays.
Magenta Screen guide
Magenta (#FF00FF) is red and blue at full power with green switched off. A green subpixel stuck on shows up as a white-ish dot, a dead red subpixel as a blue dot and a dead blue one as a red dot. Because green is off, magenta is also the quickest way to see whether a display has a green tint: any green cast makes magenta look grayish or muddy. For a full check of every channel, run the screen color test.
Magenta is the complement of green, which is why it shows up as a fringe around subjects when chroma key spill suppression goes too far. Designers also use it as a placeholder color precisely because it rarely appears in real images. As a light, it gives a vivid, party-style glow; the color cycle moves through it smoothly.
Blue is stronger than red on your panel, or a cool color temperature is set. A warmer or sRGB mode usually fixes it.
No. Magenta is equal red and blue with no green; pink mixes in some green and is lighter. Try the pink screen to compare.
Yes, especially stuck green subpixels, which show up as bright dots. Confirm on the green screen.
More colors
Each color has its own page, so you can bookmark or share a direct link.