hmmm strangely the latest foobar beta 9.5.3 b2 has made the alternating line colours stop working...
running preview 4 of the latest colums using the following
$if(%_themed%,,$if($and(%isplaying%,$not(%_is_group%)),
$puts(back,$offset_colour(%_back%,$offset_colour($calculate_blend_target(%_back%),ff0000,20),25))
$puts(back-selected,$offset_colour(%_selected_back%,$offset_colour($calculate_blend_target(%_selected_back%),ff0000,20),25))
$puts(back-selected-no-focus,$offset_colour(%_selected_back_no_focus%,$offset_colour($calculate_blend_target(%_selected_back_no_focus%),ff0000,20),25))
,
$ifequal($mod($if2(%_display_index,%playlist_number%),2),0,
$puts(back,$offset_colour(%_back%,$calculate_blend_target(%_back%),12))
$puts(back-selected,%_selected_back%)
$puts(back-selected-no-focus,%_selected_back_no_focus%)
,
$puts(back-selected,$offset_colour(%_selected_back%,$calculate_blend_target(%_selected_back%),7))
$puts(back-selected-no-focus,$offset_colour(%_selected_back_no_focus%,$calculate_blend_target(%_selected_back_no_focus%),7))
$puts(back,%_back%)
)
)
$set_style(back,$get(back),$get(back-selected),$get(back-selected-no-focus)))