Enfold Accordian – alternate background color

The Enfold forum enabled me to customize colors for the ALB Accordion element successfully. Because I have so many items, I would like to increase the readability by styling it with alternate row background colors.
How might the CSS look?

Here is the code I’m using thus far…

.main_color .toggler {
background: #f1f1f1;
color: #666666;
}

.main_color .toggler:hover {
color: #666;
background: #c1ccc1;
}

.toggler, .main_color .toggler.activeTitle {
background: #c1ccc1;
color: #666;
}

.main_color .toggle_content {
background: white;
}
.toggle_icon .vert_icon, .toggle_icon .hor_icon, span.toggle_icon {
border-color: #FFF;
}
.main_color .toggler, .main_color .toggler.activeTitle:hover {
background: #c1ccc1 !important;
color: #666 !important;
}