Sometimes, in the Portal Text Editor, it can be difficult to set hyperlink colors because the hyperlink HTML will override the color you try to give it. There is a way around this using themes.
In the Hyperlink Manager, at the very bottom is a CSS Class dropdown. This CSS Class dropdown contains all of the different tools available to you from the CSS file in the current theme.
In order to set a color for the hyperlink, I can select HyperlinkGreen as the color, and it will make my hyperlink for google come out green instead of the default color the browser is using.
In order to create these items, you'll need to add them to the CSS file in the App_Themes folder.
In the App_Themes folder you will find several themes available for use. Open the theme you are currently using and then open the .css file inside the folder, which should also have the same name as the folder.
At the very bottom, add the following:
You can create additional ones with specific colors; they just need to be of the same format as above: a period followed by a name which is what shows up in the dropdown. Then curly braces enclosing a color: #xxxxxx; to set the color.
You can add additional items in there, in case you want them to always be underlined (text-decoration: underline;) or a certain font size (font-size:11px;), or bold (font-weight: bold;).
Once you get the CSS how you want it, you will need to copy the additions you have made to each other App_Themes theme folder, in case someone else is using a different theme. If the entry is not in their theme CSS, it will show the generic default hyperlink color and style.