Monitor Color Test
Show controlled colors and gradients full-screen to check dead pixels, tint, uniformity, and visible rendering issues.
Color and test settings
Enter a CSS hex color such as #7f8790.
Enter a valid six-digit hex color.
Screen preview
Use gray and solid colors to look for persistent bands, clouds, tint, or patches.
Record the most noticeable persistent issue, if any.
Use several neutral and saturated colors. A browser color screen can reveal visible problems but cannot prove a panel is calibrated.
About this test
This page provides controlled browser patterns for visual inspection. It does not measure luminance, color accuracy, or pixel response with a sensor.
More information
How to use the test
A simple visual check
Set a stable viewing position, apply a color, and inspect the whole panel without staring at one spot too long.
Use neutral gray for uniformity and primary colors for obvious stuck-pixel or tint checks. Record only repeatable observations.
Method
What the page displays
The page fills the test stage with a chosen CSS color, gradient, or cycle state and updates the visible values for the selected color.
The timer and automatic cycle are browser timers; they do not synchronize to the display refresh cycle.
Boundaries
What this cannot tell you
The test cannot measure brightness, gamma, gamut, response time, or physical pixel defects with laboratory certainty.
Ambient light, viewing angle, panel uniformity, operating-system color management, and browser rendering can change the appearance.
Frequently asked questions
How do I check monitor colors full screen?
Choose a swatch or custom color, enter full-screen mode if useful, and inspect the display from a normal viewing position. The page stays local and does not upload data.
How can I spot tint or uneven patches on a screen?
Use neutral gray and solid colors, let your eyes adapt, and look for persistent tint, bands, clouds, or patches across the panel. Record an observation only when it remains visible.
Does this prove that a monitor is color accurate?
No. It is a visual pattern test and does not replace a colorimeter or a calibrated reference workflow.
Why can the same color look different on two displays?
Panel characteristics, brightness, viewing angle, color management, ambient light, and browser rendering can all change the appearance.
Privacy, method, and sources
Privacy, method, and sources
The selected color, timers, and observations stay in this browser. No image or test data is uploaded, and no remote API is called.
The page uses browser CSS, Canvas or DOM rendering, and independent tool code without third-party runtime services.