[Xenon]

you have to edit functions.php

find:

PHP Code:

if ($counter%2==0) {
        $post[backcolor]={ firstaltcolor };
        $post[bgclass] = "alt1";
    } else {
        $post[backcolor]={ secondaltcolor };
        $post[bgclass] = "alt2";
    } 


and replace with:

PHP Code:

if ($counter%2==0) {
        $post[backcolor]={ firstaltcolor };
        $post[backcolor2]={ secondaltcolor };
                                $post[bgclass] = "alt1";
    } else {
        $post[backcolor]={ secondaltcolor };
                                $post[backcolor2]={ firstaltcolor };
        $post[bgclass] = "alt2";
    } 


then use $post[backcolor2] as opposite