[Hippy]

add

background-color:{vb:stylevar content3_background.backgroundColor};

to alt1 and 2
so it looks like this

.alt2, .alt2Active
 {
 background-color:{vb:stylevar content3_background.backgroundColor};
 color: #000000;
 }

or you can justy do this
example

.alt2, .alt2Active
 {
 background-color:#DCDCDC;
 color: #000000;
 }