Full Screen Color Tools

A solid, edge-to-edge fill is the simplest panel diagnostic there is. A pure white fill exposes dust and dark (dead) sub-pixels; a pure black fill exposes stuck-lit pixels, backlight bleed and IPS glow; the primaries isolate a single sub-pixel channel at a time.

What a solid fill actually reveals

  • White — dust, smudges, and dark dead sub-pixels. Clean the panel before you count anything.
  • Black — stuck-lit pixels, backlight bleed at the edges, IPS glow in the corners, and clouding across the middle.
  • Red, green, blue — isolate one sub-pixel channel; a pixel that fails on only one primary has one dead sub-pixel, not a dead pixel.
  • Warm white and gray tones — tint and uniformity differences that a pure white hides.

Other uses for a full-screen colour

  • A white fill is a usable soft light source for a video call or a close-up photo.
  • A black fill removes a second monitor from view without switching it off.
  • A solid colour makes a clean chroma-free background for a screen recording.

Related sections