Change the color of text within a datePicker widget when disabled

I need to change the color of the hint text (or any text) for a date picker widget when the widget is disabled. It is too difficult to read with the current color. I have done so on dropdowns and text widgets using the style properties tab. I cannot find a place to change this color for the date picker widget though. The css is in the shadow dom and I was unsure how to do it here. Can anyone help to change this?