2.
Choose a Preset Color Scheme: Choose Commands > Set Color
Scheme to preview color schemes that set up the choices for you.
Or Select Your Own as described below.
Color Scheme for a Web Page: Choose colors for a site carefully.
If you choose a patterned or textured background for background image,
be sure the text of the page is readable over it. If you choose
a dark background color, choose light text for legibility. A light background
with dark text will be more legible. Also keep in mind that the overall
colors of the page should look good together.
Web
Safe Colors: 216 colors are considered web safe colors that display
the same way in Internet Explorer and Netscape and across Macintosh
and PC. Dreamweaver uses 212 of these colors in all the Dreamweaver
color palettes to choose backgrounds, text, link, colors.
Background
Image: For a patterned background with texture, click the browse
button by Background Image and identify a small .gif or .jpg file to
tile across the page. The image file should be stored in the web page
directory folder or a subdirectory of the web site.

Background:
Alternatively, select a solid color background by clicking in the
color square from the next to Background label. The color will be translated
into a hexadecimal number. (#FFFFFF) 
Text
and Link Colors: Text is usually black. Individual lines of text
color can be changed in the Text > Color menu. Unclicked
links are usually blue. Visited
or clicked links are usually purple. Active
links, the flash color of the link the moment it is clicked is usually
red.The web author can designate a different color set by
clicking on the color box in the Page Properties or in the Property
Inspector and choosing a web safe color.
Margins:
A left and top margin can be set for a web page in pixels. Choose
View > Rulers > Show and View > Rulers > Pixels determine
how much of a left and top margin you desire. In the Page Properties,
for cross browser compatibility, you must fill in both left and top
margin for Internet Explorer and the same settings for
margin height and margin width for the Netscape browser.