StablexUI Button Label Color

I have been looking for several hours now and cannot find a way to set the label color in a button using an XML layout

        borderColor = "0x000000"
        border      = "2"
        color = "0x000000"

Color sets the background color but not the label color.

I found the answer and it was very simple.

<Button format-color="0xFF0000" text="'Click Me'"/>