A small alert banner that links somewhere, such as to a new release or announcement.
url(str): where to link to when clicked
tag(str): text contained inside the little "tag" to the left
tag_color(str): border color of the tag on the left and the arrow on the right
text(str): text in the main area
text_color(str): dafaults to
light, the value
darkwill change text to dark color