Thank you for your post.
The tab and tab body are connected. You cannot change the color of one without changing the color of the other. Therefore, you may want to consider changing the width of the tabs to 0 (zero) pixels, and creating your own text boxes. You can then change the color of each of the tabs without affecting the tab contents. You would need to assign an Object name for each tab, and then use the new text box tabs as buttons to reference the object. For example, if you have three tabs, give them Object Names of "First", "Second" and "Third". When you create the text boxes to replace the tabs, assign them buttons that go to Object "First", "Second" or "Third". Does this make sense?
Let me know if you need clarification for any of the above steps.