The "Most" Important Web Style Rule

Hmmm. This is a difficult post. However, since I have to choose one rule, I am going to choose the one that particularly irritates me, and really intertwines with a lot of rules.

Make sure your website text is readable.

Spiderpro discusses that we should not use dark colored backgrounds, because it tends to make things less readable. I do not want to be blinded when I go to a website, and dark backgrounds require neon-like font colors, which hurts my little eyes. Also, it is important not to select two light colors, like pink and green, yellow and orange, etc. It is important to remember that though we want our websites to look cool, we are also attempting to communicate something. Let's try to do that legibly.