The article presents a set of visual design rules that can be safely followed, including using near-black and near-white instead of pure black and white, saturating neutrals, and using high contrast for important elements. These rules aim to create a coherent and visually appealing design. The article also emphasizes the importance of being deliberate with every design element and using optical alignment instead of mathematical alignment. The rules are intended to be flexible and can be broken if there is a good reason to do so.