Changing color of selected text?

How do i change the color of selected text? I figured out how to change the selection color (to lime green) for the Monokai Sublime syntax theme, but when I do that the selected text is barely visible because the editor text is light gray almost white and the editor background color is dark gray. So I want to make the selected text black so that it is easily visible when selected. What style sheet do I edit and what css or less do I hack?

u can change it by customize the syntax theme, it located on atom/packages/ur-syntax-theme