Related: How can I locate the default style sheet for a browser?
Most HTML elements have style properties associated with them such a “color”, “font-size” and “padding”. These style properties have default values. For example the “color” style property associated with the “a” (anchor) element seems to have a default value of “#000066”.
What are these values for all the other elements?
Default values are defined by each browser individually. In many cases they coincide, but sometimes they don’t. This is why it is recommended to use “CSS reset” stylesheets to default styles to the same values.
You can find some (unofficial) reference to the default browser styles here:
CSS2.1 User Agent Style Sheet Defaults
Official Mozilla default style sheet