Formatting a Link
You can change the color and underline style of a text link one of two ways: Foolproof or Easy/Colorpicker
The foolproof method -- that renders correctly in all inboxes -- is to double click the link or right click and select "Edit Link" from the menu:
On the Link pop up window, click over to the Advanced tab, and place your cursor in the Style field on the bottom right:
To remove the underline, type "text-decoration:none;" in this box.
To change the color of the text AND the link underline, type "color:#" and then the 6-digital hexadecimal code for your color. Add a semi-colon at the end
For example, for a dark gray link/underline, you'll enter "color:#333333;"
For white, "color:#ffffff;"
For black*, "color: #000000;"
*WARNING: Gmail doesn't like truly black links (they think you're trying to be sneaky!) and will turn all your links traditional blue again.
Instead, use #000001 which is very, very dark grey.
The easier way is to double click to highlight the link text (you'll have to close the pop up link window) and
then select a text color from the color menu in the editor.
You can select one of the Brand colors or Default colors, or select "More Colors" to choose from
a broader palette or to enter a specific color Hex #.