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A pure white (#FFFFFF) full screen is the sharpest test you can run on a monitor: it exposes backlight bleed, clouding and dead pixels in seconds — and doubles as a soft light source for photography, video calls and screen cleaning.
It works right in the browser — no download, no sign-up. Press any key or click for full screen, then scroll to explore bleed testing, auto pixel cycling, the gamma calibration bands and more.
Pure white surface reveals backlight bleed, clouding and IPS glow. Toggle white ↔ black to compare. Best viewed in a dark room at full brightness.
On a white background, dark or colored dots indicate stuck or dead subpixels. Auto-cycles white → black → red → green → blue in full screen.
Use as a bright background for product photography or a makeshift light table for tracing and scanning — full 100% brightness output. Keeps the screen awake while it runs.
Display the white screen on a tablet or phone next to your camera for soft fill lighting in video calls and recordings — far gentler than overhead room lights.
A white background makes dust, smudges and micro-scratches highly visible — perfect for a pre-clean check or before applying a screen protector.
Fine-tune your display with the 256-step gray band: calibrate gamma and contrast for accurate color reproduction.
| HEX | #FFFFFF | |
|---|---|---|
| RGB | rgb(255, 255, 255) | |
| HSL | hsl(0, 0%, 100%) | |
| CMYK | cmyk(0%, 0%, 0%, 0%) | |
| HSV | hsv(0°, 0%, 100%) |
Need a different color? Open any hex in the generator with a full-screen preview, or visit the white color page for shades, tints and CSS snippets: Solid Color Generator · Solid White
Set your display to full brightness in a dark room. Display pure white (#FFFFFF) and look at the corners and edges of your screen for uneven gray patches — that's backlight bleed, common in IPS and VA panels. Small, even glow along the bezel is normal; bright clouds or spots are not. Take a phone photo at a fixed exposure to document the bleed level for comparison in an RMA or warranty claim.
Dead pixels on a white background appear as dark spots that stay black or gray across every color. Stuck pixels show as a single bright dot — red, green, or blue — on every background. Run the Auto Cycle through white → black → red → green → blue to pinpoint which subpixel is affected, then note the position before contacting support.
A 24-inch monitor at 100% brightness produces roughly 250–300 lux of soft, uniform light at one meter — enough for macro product shots or a DIY tracing table. Place your subject 15–20 cm from the screen for the best diffusion, and set a manual white balance so the panel's color temperature doesn't shift your colors.
Open the white screen on a tablet or laptop placed beside your webcam at roughly 45°. The soft diffuse light fills harsh shadows far more evenly than overhead room lighting — adjust the screen brightness to control intensity. Turn off dark mode and notifications so nothing interrupts the light.
A white screen is primarily used for monitor display testing — checking for backlight bleed, dead pixels, and screen uniformity. It's also commonly used as a photography light source, video call fill light, screen cleaning test surface, and tracing light table. On OLED displays, a white screen at full brightness also tests peak brightness and color temperature accuracy.
Display pure white (#FFFFFF) at full brightness in a completely dark room. Look for uneven gray patches, bright spots, or yellowish areas, especially near the bezel edges. Take a photo at a fixed exposure and compare with other units — this documents the bleed level for potential RMA or warranty claims with your monitor manufacturer.
Short-term use (under 30 minutes) at moderate brightness (30–50%) poses no risk to modern OLED panels. However, prolonged white screens at 100% brightness may accelerate aging of the blue subpixels. For OLED TVs and monitors, we recommend running white screen tests in 5-minute intervals with color breaks — our Auto Cycle feature automatically alternates colors to prevent single-pixel stress.
The hex code for pure white is #FFFFFF (RGB: 255,255,255 | HSL: 0°,0%,100% | CMYK: 0,0,0,0). In the sRGB color space, pure white represents maximum luminance at the display's peak brightness. For web and UI design, some designers prefer slightly off-white shades like #FAFAFA or #F8F8F8 to reduce eye strain.
Unlike basic white screen tools that only display a white page, SolidColor's white screen includes integrated backlight bleed testing, dead pixel auto-cycle detection, gamma calibration bands, and full color value conversions — all in one page. Plus seamless access to 40+ solid color backgrounds, the contrast checker, color picker, and palette generator. No ads, no sign-up required.
Open this page in your phone browser and tap the screen to hide the controls; tilt to landscape for full coverage. On iOS, use Share → "Add to Home Screen" for a fullscreen experience. On Android, Chrome's fullscreen mode hides the address bar for an uninterrupted white screen.