The CSS outline property is a shorthand property for setting one or more of the individual outline properties outline-style, outline-width and outline-color in a single declaration. In most cases the use of this shortcut is preferable and more convenient.

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The outline-color CSS property sets the color of the outline of an element. An outline is a line that is drawn around elements, outside the border edge, to make the element stand out.

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The outline-offset CSS property is used to set space between an outline and the edge or border of an element. An outline is a line that is drawn around elements, outside the border edge.

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The outline-width CSS property is used to set the width of the outline of an element. An outline is a line that is drawn around elements, outside the border edge, to make the element stand out:

CSS CSS Outline CSS Property Layout Reference

The outline-style CSS property is used to set the style of the outline of an element. An outline is a line that is drawn around elements, outside the border edge, to make the element stand out.

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