Change Form Container/Border + Hint Color

[augustmuir]

Thanks for the package! Saves time on making a bunch of text field controllers from scratch, very much appreciated!

I'm only using CreditCardForm. Upon selecting the field the border color changes to the theme color, but when the field is not selected the dark border doesn't work on dark backgrounds, same for the dark text. It would be very much appreciated if the option to change the form colors more was added eventually!

See below the top field is currently selected, but the bottom field is barely visible due to the dark colors.