[Princeton]

shelly,

The point of the illustration is that readers are affected by the color choice of a website design.

Even if you add more colors or break up the text with objects, etc - you are still taking a risk.

Let's say you do all of the above (as you posted)..
Now, instead of affecting 85% of your visitors - it will now only affect 20%. You still have 20% of your visitors feeling uncomfortable - headaches, etc; not staying long; leaving your site; etc.

Yes, these numbers are provided only for illustrative purposes...
But loosing 50%, 20%, 15%, 5%, even 1% is a lot - especially, when one's goal is to increase income coming from the site.

To many site owners, conversion is the key to success.
The first thing one can do to improve conversion is to ensure they do not have a white text on dark background design.