When I change the image of a button with the setImage() method, the text remains the same color as the original image. Is this intentional?

I want to "flip" the image(see code below), giving a negative of the image when creating a scroll though a list of images. When I flip the image, the text is the same color as the background and it blends in with the new image. For instance, I have a blue background with yellow text. When I flip the image, I am expecting a yellow background with blue text but what I get is a yellow background with yellow text.

function flip(button)
{
tmpImage = button.getImage(0);
button.setImage(button.getImage(1), 0);
button.setImage(tmpImage, 1);
}

//call the function from within a button:
flip(this);

Yes, it is intentional. Unfortunately, you cannot control the Color or Font Size on the buttons/panels at this time via ProntoScript. I specifically requested this functionality and don't have an answer as to when we could expect something like this.