more ...
Still interested in learning more HTML ? Find some more chapters in the compendium :
Forms
Can be found, as expected, in the compendium, chapter "Forms".
Colours
Besides the chapter about colours you find a page, that automatically generates the numeric coding of a desired colour.
Chapter "Colours".
and more ....
If this is still not enough for you, you might find more detailed informations on special questions / aspects
in the internet (e.g. W3C homepage etc)