Yellow Screen
Yellow is the brightest single colour a screen can produce after white, because it lights the red and green subpixels together at full power. That makes it an effective, slightly warm fill light — and an easy way to spot a subpixel fault that only appears in one channel.
What this colour is good for
- Warm-toned fill lighting that is brighter than a white screen at the same brightness setting.
- Identifying stuck subpixels — a magenta dot on yellow means a dead green subpixel.
- A high-visibility background for notices, warning displays, and signage mockups.
Because it drives two subpixel channels at full power, yellow uses noticeably more energy than red or green alone. On OLED, it is the worst colour for battery life.
Frequently asked questions
Why is yellow brighter than other colours?
Yellow combines the red and green subpixels at full intensity, and those two carry most of a panel's perceived brightness. Only white drives all three channels harder.
Can I use yellow as a night light?
Better than white or blue — yellow has less blue content, which interferes less with sleep. But any bright screen still suppresses melatonin, so keep it dim.