CrazyTalk lets you modify the inner mouth or throat color settings for animation scripts which require the mouth to be opened wide. Click the Mouth tab in the Advanced Facial Settings menu to adjust the color levels of the inner mouth:
To adjust the texture and color levels of the inner mouth, move the Brightness, Contrast, Hue, and Saturation slider bars to achieve a throat color that matches with the rest of the facial color settings. Alternatively, enter a number directly in the boxes next to the slider bars to change the parameter value. Changes can be seen immediately in the image window. The mouth of your model will be wide open during this operation to allow you to better see the color change. Click Reset at any time to clear your changes and restart. Click OK when done.