Outline-offset

The   property is used in CSS and certain HTML elements. It is used to set space between an  and the edge or   of an element. An outline is a line that is drawn around elements, outside the border edge. The space will be transparent (the parent will determine the background).

Values
HTML example:

QWERTY

That produces: QWERTY

CSS example:

h1 { outline:medium ridge white; border:thin solid white; outline-offset:5px; }