TN panels are still very popular. On those, elements displayed on screen very easily lose contrast when looking at them at an angle. Back when ads were actuall

TN panels are still very popular. On those, elements displayed on screen very easily lose contrast when looking at them at an angle. Back when ads were actually a different background color on Google, I suspect they A/B tested background colors right up to the point that they disappeared on cheap TN laptops. I experienced this first hand when helping a friend with their laptop 5-10 years ago, and they clicked on an ad by mistake. Turned out that the ad background turned white at normal laptop viewing angles.