What this test can tell you
The page draws a solid color for you to inspect visually. Compare more than one background and distinguish a mark fixed to the display from something that moves with page content.
It does not automatically detect defects, measure color accuracy or repair a panel. Browser fullscreen, color settings, brightness and room reflections affect what you see.
How to use it
- Choose a preset or pick your own color.
- Press “Open fullscreen” or the F key.
- Press Esc or tap to exit.
Popular colors
Choose red, green and blue to compare the primary color channels, gray to inspect uniformity, or a custom color for a background or light. This page is not a color-calibration instrument or a certified photographic safelight.
Not working? Try these fixes
Colors look different on another device
Every display has its own color profile and brightness. Disable night mode and adaptive color for the most accurate result.
Frequently asked questions
Can I enter an exact HEX code?
Yes. Use the color picker and type any HEX value such as #FF8800.
Can I download the color as an image?
Yes. Download image saves a solid-color PNG sized from the CSS screen dimensions multiplied by the current device pixel ratio. This is not guaranteed to match the panel’s native resolution.