My email signature is red and black with a white background so having my phone numbers converted to a bright blue created a pretty ugly signature. So here is what worked for me. Now keep in mind that you want keep your phone numbers clickable. Do this, in the between the right hand bracket and the area code I deleted the space and inserted a period. From (111) 222-3333 to (111) .222 -3333. This stops your email program from converting into to a blue clickable link. Now highlight the phone number and change the color. Now highlight it again and click the Link button and insert the following tel:1112223333 Now lastly, highlight the period and change it to white so it's invisible. You might have to go back and redo the colors but now you have a clickable phone number in the color of your choice. Now keep in mind that the phone numbers are still underlined.
... View more