This is the delegate I am currently using to get two lines:

class AccountListDelegate(QtWidgets.QStyledItemDelegate):
    def displayText(self, value, locale):
        text = super().displayText(value, locale)
        separator = ":"
        values = text.split(separator)
        return f"{values[0]}\n{values[1]}"

Is there a way to change the color of the bottom line?