CrazyTalk lets you modify the inner mouth and throat color for animation scripts which require the mouth to be opened wide. Click the Mouth tab in the Mouth Settings panel 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 sliders until you achieve the desired throat color. Alternatively, enter a number directly in the boxes next to the sliders to change the parameter's 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 the Resume button at any time to clear your changes and restart. Click the OK button when done.