/* anything related to the light theme */
html[data-theme="light"] {

    /* whatever you want to change */
    --pst-color-table-row-hover-bg: #d1d5da;
}

/* anything related to the dark theme */
html[data-theme="dark"] {

    /* whatever you want to change */
    --pst-color-table-row-hover-bg: #d1d5da;
}