mat-*-button don't respect foreground color of dark theme when [color] not set #9231
Description
Bug, feature request, or proposal:
When using dark theme, and using 'default' color (so [color] not set), button text (or icon) is rendered black, and hover overlay is also dark. I think ripple effect is actually correct.
What is the expected behavior?
Material buttons should obey theme colors.
What is the current behavior?
The don't
What are the steps to reproduce?
Here is very simple demo:
https://stackblitz.com/edit/angular-material2-issue-t2aufv
Which versions of Angular, Material, OS, TypeScript, browsers are affected?
Angular 5.1.2, Material 5.0.3