Button should appear as having netural importance. The
primary modifier can be used on buttons that need to convey more importance.
primary- Makes the button more important.
positive- A button that implies a positive outcome.
negative- A button that implies a negative outcome.
solo- A button that is standalone and does not have siblings within the information heirarchy.
inline- A button that has a small amount of spacing so buttons may be placed next to each other.