This is the dark palette I use. Sharing it because people might want to see all the element names:

root=white,black
border=black,lightgray
window=lightgray,lightgray
shadow=black,gray
title=black,lightgray
button=black,cyan
actbutton=white,cyan
compactbutton=black,lightgray
checkbox=black,lightgray
actcheckbox=lightgray,cyan
entry=black,lightgray
disentry=gray,lightgray
label=black,lightgray
listbox=black,lightgray
actlistbox=black,cyan
sellistbox=lightgray,black
actsellistbox=lightgray,black
textbox=black,lightgray
acttextbox=black,cyan
emptyscale=,gray
fullscale=,cyan
helpline=white,black
roottext=lightgrey,black