Definitely dark, I find my eyes feel more strained looking at themes with a light background. My go-to for many years now has been the Wombat scheme (originall

Definitely dark, I find my eyes feel more strained looking at themes with a light background. My go-to for many years now has been the Wombat scheme (originally for vim here https://dengmao.wordpress.com/2007/01/22/vim-color-scheme-wombat/ https://dengmao.wordpress.com/2007/01/22/vim-color-scheme-wo... but you can find ports to other editors such as Visual Studio, Eclipse, XCode, etc if you hunt around a bit).