I've got a menu with tabs of various colours that we did using CSS. Plus there is a horizental bar undeneath the tabs. What I wish to do is get it therefore the bar changes colour to complement the color from the tab. I'd assume I'd do that in jquery although not entirly sure where you can attempt searching smart because this paragrah is all about as short when i makes it to describe what I wish to do! Using wordpress so any kind of wordpress plugin that performs this possibly too?

Without specifics for your html i'm able to demonstrate list of positive actions however it wont work without you modifying the code.

Essentially you may need a onclick event to alter the underside bar colour. The onclick event could be on each tab you have.

$("#tab1").click(function ()    {
        $("#bottombar").attr( "bgcolor" , "COLOR CODE HERE"  );  
});