Color Test
Presents full-screen solid primary, secondary, and neutral swatches, plus an interactive custom color picker to verify uniform color temperature, saturation, and tint across your display.
- Cycle through standard sRGB primary (Red, Green, Blue) and secondary (Cyan, Magenta, Yellow) colors.
- Look for color shifts, tint irregularities (e.g. green or pink cast), or edge discoloration.
- Use the custom color picker outside fullscreen mode to test any specific HEX or RGB hue on your display.
- Click "Test This Color" to view your customized shade in full edge-to-edge mode.
Select any custom hex color to evaluate rendering and tint accuracy across your screen.
What This Test Checks
- Color temperature and white point consistency across all screen quadrants.
- Subpixel channel balance for pure Red, Green, and Blue primaries.
- Secondary color blending (Cyan, Magenta, Yellow) accuracy.
- Corner-to-center tint shifts (such as unwanted pink, green, or yellow color casts).
How to Perform the Test
- Allow your display to warm up for 15–30 minutes to achieve stable operating temperature.
- Disable any blue light filters (like f.lux, Windows Night Light, or macOS True Tone) that alter color output.
- Launch fullscreen mode to evaluate edge-to-edge solid color swatches.
- Use the custom color picker tool to test exact brand colors, web palettes, or specific pantone approximations.
- Observe if the color remains uniform from the center to the outermost edges.
What to Look For
- Color temperature gradients: for example, one half of the monitor appearing warmer (reddish/yellow) than the other half (cool/blue).
- Vignetting: significant brightness or saturation drop-off near the corners.
- Dirty Screen Effect (DSE): blotchy or dusty textures visible beneath solid bright colors.
- Tone shifts when moving your head slightly off-center (viewing angle stability).
Common Display Problems & Diagnostic Guidance
Dirty Screen Effect (DSE)
DSE appears as cloudy or smudgy patches across solid colors, often caused by microscopic manufacturing variations in diffuser sheets or LCD crystal alignment.
Color Temperature Mismatch (Multi-Monitor)
Placing two identical monitors side-by-side often reveals different factory white points (e.g. 6500K vs 6800K). Fullscreen solid white and gray tests help you manually calibrate your monitor OSD RGB gain settings to achieve an exact match.
Wide Color Gamut (DCI-P3 / AdobeRGB)
Modern wide-gamut monitors can over-saturate standard sRGB content if color management is not enabled in the OS. Testing pure sRGB primaries helps determine whether your display profile is properly configured.
OLED Subpixel Arrangements
OLED displays using WRGB or QD-OLED triangular subpixel structures can display subtle fringe colors along high-contrast boundaries. Fullscreen solid fields verify that each subpixel layer illuminates uniformly.
Frequently Asked Questions
Why do pure colors look different from different viewing angles?
TN (Twisted Nematic) and VA (Vertical Alignment) panels suffer from color shift when viewed from the side or above. IPS and OLED panels offer superior 178° viewing angles with minimal color distortion.
Can this test calibrate my monitor colors automatically?
No web browser can adjust your monitor hardware color lookup tables (LUT) directly. However, it provides accurate reference targets for use with hardware colorimeters (like Datacolor Spyder or Calibrite ColorChecker).
What is Delta E in display color testing?
Delta E (ΔE) measures the mathematical difference between a displayed color and its theoretical reference. A ΔE under 2.0 is considered imperceptible to the human eye, which is the standard for professional photo and video editing displays.