Remove hard-coded black color

[kimsreng]

It is easier to adapt to theme change when the color is not hard-coded

[saguado69]

I have been able to color the chips with ChipTheme.of but didn't found the way to format the titleText and hintText, so any suggestion for this? Wil be nice if we can set this on the widget.

UPDATE:

Seems they are hardcoded with black and grey.

Have added styling on my theme and still black.

inputDecorationTheme: const InputDecorationTheme(
labelStyle: TextStyle(color: Colors.white),
hintStyle: TextStyle(color: Colors.white),
),

Thanks

Santi.

Fixed!!! Thanks

[cetorres]

Please fix the conflict, so I can merge your PR.
Thank you.