JAWS and VO are not announcing the value of JSliders inside the JColorChooser always. They announce it first time always when the JSlider comes in focus. Afterwards, if the value is changed by Keyboard/mouse, JAWS and VO do not announce value always, but they do it sometimes randomly. The value should always be announced.
They announce the value correctly when the JSlider is used independently outside the JColorChooser.