The specified value of a CSS property is the value it receives from the document's style sheet. The specified value for a given property is determined according to the following rules:
- If the document's style sheet explicitly specifies a value for the property, the given value will be used.
- If the document's style sheet doesn't specify a value but it is an inherited property, the value will be taken from the parent element.
- If none of the above pertain, the element's initial value will be used.