Spot a color tint on one screen by comparing neutral grays

Join both screens to one session. Create it on the screen you trust, then join from the suspect screen with the 4-character code or the share link. Type each neutral into the HEX field: #FFFFFF for white, #CCCCCC for light gray, #808080 for mid gray and #333333 for dark gray. Start with white, then move through light gray, mid gray (where the page opens) and dark gray. Put both screens at the same brightness, in the same room light, from the same distance, and look at each level for a few seconds before you move on.

A tint shows as a faint color cast over the gray. Write down the color you see on each level, such as green, pink or yellow, and whether both screens show it. A cast that shows on every level is a steady tint. One that shows at some levels only is worth noting, since it tells you where to look more closely. If the tint looks patchy, with one corner warmer than the middle, the uniformity checks in the monitor test show that more clearly.

The tool can't say what color the tint is in numbers, and it can't tell you whether the screen is faulty. Picture mode, color temperature and room light can all change how a gray looks, so a tint may come from how the screen is set rather than the screen itself. This check can't separate those causes. A single screen alone is a weak test, because there's nothing to compare it with, and a second screen gives you a reference.