Maybe use text button color for register button instead of color scheme.

[ArmenKesablyan]

flutterfire/packages/flutterfire_ui/lib/src/auth/views/login_view.dart

Line 136 in 982bdfb

registerTextColor = theme.colorScheme.primary;

I had to jump into the code to see how to actually change this color. Should be similar to the forgot password color. Why not just use that.