Here's my latest attempt at making a large body of text less painful to read. You'll notice that it's much easier to find the next line because your eyes will natually draw toward the last colour read. I deliberately picked a language I don't know because I didn't want the context to interfere with my evaluation of readabiliy.
And plain black text for comparion's sake. It's not impossible to read or anything, but it's easier to lose track if you let your eyes wander.