You can hide the text color option from the post editor by following the instructions below:

1. Log in to your Website Toolbox account.
2. Click the Integrate link in the main menu.
3. Click the Custom Code link.
4. Copy the HTML code below into the Forum Head Tag HTML Code text box:

   <style>
   .mce-colorbutton {
       display: none !important;
   }
   </style>
   

5. Save the changes.