# Text Changes Color When Scrolling on LCD Monitor Why? **URL:** \ **Category:** Factual Questions\ **Created:** [May 10, 2006, 9:00pm UTC](https://boards.straightdope.com/t/text-changes-color-when-scrolling-on-lcd-monitor-why/356274 "2006-05-10T21:00:26Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Frylock](https://avatars.discourse-cdn.com/v4/letter/f/ce7236/32.png) [@Frylock](https://boards.straightdope.com/u/Frylock)\ **Post date:** [May 10, 2006, 9:00pm UTC](https://boards.straightdope.com/t/text-changes-color-when-scrolling-on-lcd-monitor-why/356274/1 "2006-05-10T21:00:26Z")
Why is it that on some LCD monitors, while I am scrolling through text, that text changes color to red (instead of black) until it comes to a halt again? My theory is that somehow the text is moving so fast that a pixel-triplet that was going to be white only has time to activate the red portion of the triplet before the black text moves in to halt the activation. Does that sound right? -FrL- ---
**Author:** ![Mangetout](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mangetout/32/19_2.png) [@Mangetout](https://boards.straightdope.com/u/Mangetout)\ **Post date:** [May 10, 2006, 9:36pm UTC](https://boards.straightdope.com/t/text-changes-color-when-scrolling-on-lcd-monitor-why/356274/2 "2006-05-10T21:36:45Z")
Certainly sounds like some kind of trailing problem such as you describe, and yes, probably caused by difference in the reaction times of one set of pixels. Try it with scrolling text in each of the primary and secondary colours; if you’re right, then perhaps blue or cyan text will disappear almost entirely until stationary. ---
**Author:** ![MikeS](https://avatars.discourse-cdn.com/v4/letter/m/919ad9/32.png) [@MikeS](https://boards.straightdope.com/u/MikeS)\ **Post date:** [May 10, 2006, 10:16pm UTC](https://boards.straightdope.com/t/text-changes-color-when-scrolling-on-lcd-monitor-why/356274/3 "2006-05-10T22:16:03Z")
It could also be an example of [Fechner colors](http://en.wikipedia.org/wiki/Fechner_colors), too. You can view an example of it [here.](http://dogfeathers.com/java/fechner2.html) Of course, you need regular patterns for this, so it’s a bit of a long shot, but I figured I’d mention it 'cause it’s so nifty. 🙂