Dead Pixel Colors — What Each One Means

A black dead pixel is the only true dead pixel. The thin-film transistor controlling this pixel has failed in the closed (off) state — no electrical signal reaches the pixel cell, so it produces no light regardless of what is displayed. On an LCD panel, the pixel appears as a dark grey dot rather than pure black because the backlight bleeds slightly around the failed cell. On an OLED panel, with no backlight to bleed, it is a perfect absolute black visible against every background color. Black dead pixels cannot be fixed by any software method. They require display replacement, and are covered by manufacturer warranty above the minimum defect threshold.

A white dot — called a hot pixel — occurs when all three sub-pixel channels (red, green, and blue) are simultaneously stuck at full brightness. Because every color display mixes red, green, and blue to produce its full palette, having all three stuck on produces the brightest possible output: white. Hot pixels are the most visually disruptive type, visible against any background including pure white (where they appear as a slightly brighter pinpoint). They are a sub-category of stuck pixel — the transistors are stuck on rather than off — and occasionally respond to rapid color cycling, though recovery rates are lower than single-channel stuck pixels.

A red dot indicates that the red sub-pixel transistor is stuck in the on state while green and blue are either off or functional. The pixel outputs maximum red regardless of the intended color. On a black background a red stuck pixel glows brightly; on a white background it may look like a very slightly warm-toned dot or be difficult to distinguish from the surrounding white. A red dot is a stuck pixel, not a dead one, and has a reasonable chance of responding to rapid color cycling — particularly on IPS and VA LCD panels. On OLED panels, recovery rates are lower.

Green is the most frequently reported stuck pixel color on LCD displays. The green sub-pixel occupies a larger area in the standard RGB stripe layout used by most panels — a larger transistor gate means a slightly higher statistical chance that a manufacturing impurity will cause an open-state failure. A green dot is always a stuck pixel and is one of the most likely types to respond to rapid color cycling. It is most visible on black, red, or blue backgrounds, and blends in naturally on green content. If your pixel appears and disappears when viewed on different colored backgrounds, confirm it on black first — a green dot on a black screen is unmistakable.

A blue dot indicates the blue sub-pixel channel is stuck on. Blue stuck pixels are less common than green but more noticeable against neutral or warm content — a blue dot on a grey or white background stands out clearly. On a blue background it disappears entirely. Blue stuck pixels respond to rapid color cycling with similar rates to red stuck pixels. If your display has a blue tint over a small area rather than a single dot, check the panel for backlight bleed (a different issue entirely) before assuming a pixel defect.

A yellow dot means both the red and blue sub-pixel channels have failed — red is stuck on, green is stuck on, and blue is off (or in some display layouts the exact channel combination varies). Red and green light together produce yellow in an additive RGB system. Yellow stuck pixels are less common than single-channel failures because they require two independent transistors to fail in the same way simultaneously. Like all stuck pixels, yellow sometimes responds to rapid color cycling. It is most easily spotted on a blue or black background, where the yellow dot creates the strongest contrast.