Your Phone's Night Mode Makes You Temporarily Colorblind Every Night
aakashgupta · x · 2026-11-15
- A thread explains how night mode shifts a phone's color output enough to make purple letters vanish from colorblind test plates—a temporary blue-cone sensitivity loss, not real colorblindness (true blue colorblindness affects fewer than 1 in 10,000 people).
- The chart mimics the Cone Contrast Test used by the US Air Force on pilot applicants: red/green/purple columns target L/M/S cones with fading contrast. Normal vision reads red and green at 1-2% contrast, but purple requires 7-13%—right where night mode pushes you.
More from Fun
- Dev says Claude Opus 5.5 and Fable 5.2 built the coziest game he's ever played — prasenx · 2026-11-15
- Fable 5.2 builds a swimmable underwater world in a single 97 KB HTML file — kimmonismus · 2026-11-15
- Child beats two robot policies in first live Child-Robot Challenge at CoRL 2026 — kastnerkyle · 2026-11-15
- The hot-switching meme: same people rebranded as web3, ML, AI engineers — finishing nothing — cneuralnetwork · 2026-11-15
- AI grocery agent adds 72 eggs to Michigan man's cart unprompted — Polymarket · 2026-11-15
- Parody benchmark: Gemini 4 Hydrogen tops the chart with 14 letters in its name — Pixelied · 2026-11-15