Install BeeLine reader and the extension will create alternating lines of colored text. Each line will be treated by a gradient of colors, moving from light to dark as your eyes move left to right. By making each line a different color, your brain is in a better position to target your place in the text — taming the frequency of "line transition errors" (accidentally skipping a line or rereading a line).
It's an odd experience — you really can "feel" your eyes being pushed from line to line. The developers claim that the technique works even better on your mobile devices, which tend to have shorter lines. But, don't take our word for it. You can take an online quiz to see if you're better suited to boring, ol' black-and-white or if the brave new world of candy-colored text is for you. (The Verge)