Hey,
Love the theme. But one thing that's been really frustrating is that one colour in particular seems to come out invisible, as light on a light background. I'm assuming, it could be a quirk in my system, but I finally switched over to a different light theme to see and it was fixed.
For me, it's the colour that the currently selected line in the Problems pane is. I've also just installed the output colouriser extension, and the same issue for the colour that warnings and errors are shown up as. Which is great as that's the only reason I installed it! :P
Including some screenshots of how it looks for me.
Possibly related is #30.
Problems pane:

Colourised output pane:

