Вы можете создать собственный файл стиля и импортировать его, а не импортировать связанный стиль, поставляемый с пакетом. Вот так:
// NOTE: the order of these styles DO matter
// Will edit everything selected including everything between a range of dates
.CalendarDay__selected_span {
background: #82e0aa; //background
color: white; //text
border: 1px solid $light-red; //default styles include a border
}
// Will edit selected date or the endpoints of a range of dates
.CalendarDay__selected {
background: $dark-red;
color: white;
}
// Will edit when hovered over. _span style also has this property
.CalendarDay__selected:hover {
background: orange;
color: white;
}
// Will edit when the second date (end date) in a range of dates
// is not yet selected. Edits the dates between your mouse and said date
.CalendarDay__hovered_span:hover,
.CalendarDay__hovered_span {
background: brown;
}
Подробнее смотрите здесь здесь .