The style rule for p is black, so this should be black, note that P is more specific than body tag, therefore it will default to the black color, I have created to descendents span and em: span will use the color green and
will use green with 150% font size finally bold is 16px ps I know bold is not xhtml 1.0, Note we can get fancy and have a em inside a p inside a em with 12 pt Note in Dreamweaver font-size menu list px pixels and larger, smaller, etc.. but no pt or percentages.
most CSS styles appear in side of the dreamweaver design pattern. To test first use Opera, then firefox then IE. Opera is best at supporting CSS, firefox is second best, IE is the most popular, wonder if KDE konqueror and/or Mac Safari is also worth testing?