Outline Styles:
A dotted outline
A dashed outline
A solid outline
A double outline
A groove outline. The effect depends on the outline-color value.
A ridge outline. The effect depends on the outline-color value.
An inset outline. The effect depends on the outline-color value.
An outset outline. The effect depends on the outline-color value.
Outline Width:
A thin outline.
A medium outline.
A thick outline.
A 4px thick outline.
Outline Color:
A solid red outline.
A dotted blue outline.
An outset grey outline.
Just placeholder width=60%. Notice that the outline is not included in the width
consideration for HTML elements.
Outline Offset
This paragraph has an outline of 15px outside the border edge.