CODE EXAMPLE FOR CSS

oracle apex interactive report odd even

/* Give a static ID to the region, for example AlternateRowIR */

#AlternateRowIR .a-IRR-table tr:nth-child(odd) td {
     background-color: #DBE5F1;
}

#AlternateRowIR .a-IRR-table tr:nth-child(even) td {
     background-color: white;
}