You can use the Dreamweaver highlighting preferences to customize the highlight colors for the outlines around the editable and locked regions of a template in Design view. The editable region color appears in the template as well as in documents based on the template.
Click the Editable Regions, Nested Regions, or Locked Regions color box, then select a highlight color using the color picker (or enter the hexadecimal value for the highlight color in the box).
For information about using the color picker, see Use the color picker.
Highlight colors appear in the document window only when Invisible Elements is enabled and the appropriate options are enabled in Highlighting preferences.
If invisible elements are showing but the highlight colors are not, select Edit > Preferences (Windows) or Dreamweaver > Preferences (Macintosh), and then select the Highlighting category. Make sure that the Show option next to the appropriate highlight color is selected. Also make sure that the desired color is visible against the background color of your page.