how do users can change the forum skin color by themselves? How can i add more color features & let the user to change them? Thanks
They can change the skin in the skin selector at the bottom of the forum, provided you have it enabled. You can get new skins at vB.org as long as you have a legal license.
But Dear What About Skin Color how do i give different color to the same skin & let the user to choose their own one ?
If there are no graphic colors to be changed, then you could set up a sub-theme for each color you want only changing the style sheets in each of those sub-themes. If your forum uses different images such as gradients behind menu headers, etc. that you want changed as well, then you will need to copy and change those graphics (or get someone to do it for you) and then make changes to each sub-theme style sheets or image locations as needed. Essentially, offering color options is the same thing as offering different themes. vBulletin's layered theme system though makes it a little easier than that though. -Zeras
Here is a real nice theme called Bingo, that allows users to change between 8 colors with a click of an icon.