Screen Contrast Test

Understanding Your Screen's Contrast with DeadPixelTest.org

Ensuring your screen displays a full range of colors and has well-adjusted contrast is key for everything from enjoying movies to detailed design work. The two tests described below can help you quickly assess your monitor's performance and make necessary adjustments.

Color Gradient Test

This test is designed to check how well your screen displays smooth transitions between shades of a color. It shows several rows of color gradients, including primary colors like blue, green, and red, as well as white, turquoise, pink, and yellow.

• How it works: Each row is made up of a number of individual blocks of color. Ideally, you should be able to distinguish each block from its neighbors. If the blocks blend together and you can't see the individual squares, especially at the darker or lighter ends, your screen's contrast might not be optimally set.
• Controls:
  • Shades Slider: You can change the number of shades in each gradient, from 5 to 100. A higher number of shades makes the test more challenging for your display.
  • Reverse Order: This button flips the gradient, moving from light to dark instead of dark to light.
  • Fullscreen: This allows you to view the test without any distractions.

Text Contrast Test

This test helps you determine the legibility of text against a black background. This is particularly important for reading comfort and reducing eye strain.

• How it works: A sample text is displayed, and you can adjust its color and transparency. The goal is to find the point at which the text becomes difficult or impossible to read.
• Controls:
  • Text Color: You can select any color for the text to see how it contrasts with the black background.
  • Opacity Slider: This slider adjusts the transparency of the text, from fully opaque (100%) to completely transparent (0%).
  • Fullscreen: This provides an immersive view for more accurate testing.

How to Make Sure Your Screen Has the Best Contrast

If these tests reveal that your screen's performance could be better, here are some steps you can take to improve its contrast:

• Adjust Your Screen's Built-in Settings: Most monitors and laptops have buttons or an on-screen menu that allows you to directly control brightness, contrast, and sometimes gamma.
  1. Start with Brightness: Set the brightness to a comfortable level for your viewing environment. It shouldn't be so bright that it hurts your eyes or so dim that you have to squint.
  2. Then, Adjust Contrast: Increase the contrast to make the whites brighter and the blacks deeper. Use the gradient test to find a sweet spot where you can see the maximum number of distinct shades without losing detail in the brightest or darkest areas.
• Use Your Operating System's Calibration Tool: Both Windows and macOS have built-in screen calibration utilities.
  • On Windows: Search for "Calibrate display color" in the Start Menu and follow the on-screen instructions.
  • On macOS: Go to System Settings > Displays > Color Profile and click on "Calibrate...".
  • On Linux: Most desktop environments (like GNOME and KDE) have color management tools in their system settings. In GNOME, go to Settings > Color and you can add a color profile for your screen. For more advanced calibration, you can use tools like DisplayCAL.
• Check Your Graphics Card Settings: Your graphics card's control panel (like NVIDIA Control Panel or AMD Radeon Software) offers more advanced settings for color, contrast, and gamma.
• Consider Your Lighting: The ambient light in your room can significantly affect how you perceive your screen. Try to avoid direct glare on the screen and maintain consistent lighting.
• Keep Your Screen Clean: A clean, dust-free screen will always provide a clearer and more vibrant picture.