I am looking for an application skinning engine that supports colour
themes. Winamp is an example of an app supporting colour themes. For
example in Winamp I can pick the "Winamp Modern" skin and apply one of
the 30 or so color themes to that skin - so it's the same skin in
different colors.

I have looked at various skinning engines such as skinmagic,
themeengine, directskin, etc, but none of those support color themes.

Can anyone point me to such a skinning app? Thanks.