Dead pixels
Dead pixel test
Color fields for dead-pixel hunts, a 1px grid, and a gradient for banding. Full screen hides the browser chrome. Tap or space to cycle. Esc exits.
How to hunt dead pixels
- Hit full screen, then cycle black, white, and primary colors.
- A stuck pixel stays the wrong color on every field.
- A dead pixel stays black on white.
- Sit about 50cm back — subpixels look like defects up close.