You can easily swap out the default connect tab icon with one more consistent with your brand's look and feel. Logged in as a Facebook page admin, click on the down carrot that appears at the end of your tabs.
Hover over the connect tab to reveal the editing tool, then select "Edit Settings."
Click "Change" next to "Custom Tab Image" in the pop-up box to upload your own image. You can also rename the tab. Don't forget to save your changes!