The Wiki article seems to be somewhat outdated. The official manual will contain a more complete reference.
There is no “list” of skin.ini entries though, because it would be far too long - in particular for the playlist row colors, there’s so many possible combinations. Generally, the format for row color entries is
[History][Player State][Item Class]RowColor
The same applies to the various playlist fonts.
You may want to have a look at the translated German Wiki article on playlist skins: