Hi Kolien, try this:
.mx-listview > ul > li:nth-child(odd) {background-color: #BADa55;}
.mx-listview > ul > li:nth-child(even) {background-color: white;}
You found it! :)
You could build your own function to check whether you are on an odd or even row. Using the row ID or a custom counter as input and the modulo function to determine whether the current row is even. If so, give it a different underlayColor.
See as well this StackOverflow solution.