Give Kalopsia a blue caret.
Add a darker variant of Kalopsia: Kalopsia Darker.
Add the Void theme.

This one's really freakin' dark.
Tweak gutter and line highlights in Kalopsia Darker.
Make modified tab highlights brighter.
Tweak puck color to be a little brighter.
Tweak highlights/pucka  bit more.
Screenshot for Void.